This list is a good example of the sort of arguments that look persuasive to those already opposed to HBD, but can push people on the fence towards accepting it, so it may be net-negative from your perspective. This is what has happened to me, and I'll elaborate on why – so that you may rethink your approach, if nothing else.

Disclaimer: I am a non-Western person with few traits worth mentioning. I identify with the rationalist tradition as established on LW, feel sympathy for the ideal of effective altruism, respect Bostrom despite some disagreements, have donated to GiveWell charities on EA advice, but I have not participated more directly. Seeing the drama, people expressing disappointment and threatening to leave the community, and the volume of meta-discussion, I feel like clarifying a few details that may be hard to notice from within your current culture, and hopefully helping you mend the fracture that is currently getting filled with the race-iq stuff.

All else being equal, people who hang around such communities prefer consistent models (indeed, utilitarianism itself is a radical solution to inconsistencies in other ethical theories). This discourse is suffused with intellectual inconsistency, on many levels of varying contentiousness.

• On the faint level of moral intuitions, there's the strange beeline from the poorly supported prior that normalization of beliefs like Bostrom's will lead to bad effects like discrimination, to the consequentialist decision against entertaining them. It is not clear that Bostrom's beliefs are harmful in this way, or more likely to encourage a net increase in discrimination than their negation. Arguments from historical precedent have big problems with them: they do not address the direction of causality, or the fact that different cultures can have different reactions to the same information. As it is not considered normal in the modern culture to equate moral worth and ability for individuals of any group, it can be expected that the same will hold should the difference in ability between groups be acknowledged. Arguments from personal distress of users are valid points with regard to community health, but obviously (I hope) incommensurate with the question of global utility, and do not directly weigh on it. So the consequentialist case for not taking Bostrom's belief in good faith is already suspect.
• Perhaps the most obvious level is that specific failings Bostrom is credibly accused of (racist attitude, belief in the racial IQ difference, belief in the validity of IQ measurement) do not depend on HBD. (He has done himself no favors by bringing up eugenics). So it's bizarre to see many people denounce his beliefs in toto, but support this denunciation with environmentalist explanations of the IQ gap – in effect, conceding the specific factual claim in Bostrom's old email, or at least demonstrating that it is not beyond the pale by their own standard. To be clear: it is not in doubt that the IQ gap between Black and White Americans exists; and that it is as predictive of outcomes associated with cognitive capacity as IQ measurement is (which is to say, highly predictive – and this, too, is mainstream consensus). People who act indignant about such statements send a huge red flag, demonstrating either general unwillingness to educate themselves or irrational ideological bias on this specific matter. People who bring up irrelevant anti-HBD talking points demonstrate confused reasoning.
• Less obviously, the problem is portraying this as an open-and-shut case – a portrayal which doesn't really survive scrutiny. I don't know how to put this nicely, but what your list most reminds me of is polemics of sophisticated Creationists in the heyday of New Atheism. It's a mix of true but irrelevant, misleadingly phrased, blatantly misinterpreting and patently false claims. Instrumentally they are gotchas; structurally, opening moves aimed at people who are not familiar with the debate and are not aware that all those issues had long been answered, and the debate is incredibly mature. Of course, in all such debates both sides can assert that they've solved every vulnerability, and this forum isn't some HBD Central. So I won't compete in citations, and will just address things a total layman, provided he's minimally erudite, napkin-numerate, capable of critical thought and aware of basic logical fallacies, could spot, if he were so inclined. You way "Now you might want to attack one of these (and feel free to send me a message), but even if you're right, that would still leave more than enough reasons to stay away from HBD." What if we go through every one of these?

1. Human biodiversity is actually pretty low. Homo sapiens has been through a number of bottlenecks. – maybe true but vacuous. "Pretty" low relative to what baseline? How would we even tell – do we have anything like IQ for other species? Does this genetic fact establish some prior for the magnitude in differences in measurable phenotypic traits between groups? What about individuals? What we do know that people with a priori negligible "biodiversity" – as in, children in ethnically endogamous marriages, even in isolated villages – routinely have large differences in all traits of interest. So how much diversity is needed, really, to introduce some measurable population-level divergence? Likewise for the point about bottlenecks, what of it? Should our layman just conclude that this is an authoritative-sounding technical term?
2. Human migrations over the last thousand years have been such that literally everyone on Earth is a descendant of literally everyone that lived 7000 years ago whose offspring didn't die out. This is known as the Identical Ancestors Point. – grossly misleading/false, and doesn't pass basic sanity check. Is every single unadmixed Indigenous Australian really a descendant of "literally everyone" 7000 years ago, same as every single Han Chinese? But, looking it up, National Geographic says that "Aboriginal Australians are all related to a common ancestor who was a member of a distinct population that emerged on the mainland about 50,000 years ago", which implies people of other populations are not all related to him. Aha, here's where your figure comes from: "Rohde, Olson and Chang showed through simulations that, given the false assumption of random mate choice without geographic barriers, the Identical Ancestors Point for all humans would be surprisingly recent, on the order of 5,000-15,000 years ago." But it is indeed false, there were barriers for the entire history of our species, such as oceans; and how do migrations of the last millenium negate it? More importantly, it's a quantitative issue. Your link goes on to say: "Thus, even though the Norwegian and Japanese person share the same set of ancestors, these ancestors appear in their family tree in dramatically different proportions. A Japanese person in 5000 BC with present-day descendants will likely appear trillions of times in a modern-day Japanese person's family tree, but might appear only one time in a Norwegian person's family tree." Seeing as every specimen can have novel genetic variants, this should allow for arbitrary magnitude of divergence, no?
3. Africans have more genetic diversity than literally every other ethnicity on earth taken together, so any classification that separates "Africans" from other groups is going to be suspect. – misleading. The money quote is: "Tishkoff and her colleagues studied DNA markers from around the planet, identifying 14 "ancestral clusters" for all of humanity. Nine of those clusters are in Africa. "You're seeing more diversity in one continent than across the globe," Tishkoff said." Okay, let's assume that those 9 clusters are meaningfully different (as are the other 5). When people talk of "Africans", in practice, whom do they refer to? Looking it up,

"The very-diverse are hunter-gatherer populations who live in clusters scattered across Central and Southern Africa, in Namibia, Botswana, the Congo and a dozen other nations. They include the Khoi, the San, the Mbuti, the Mbenga, the Twa and the Hadza. [...] Save for that isolated half-million very-diverse hunter-gatherer minority, all Sub-Saharan Africans constitute the genetically in-between group of 1.14 billion not-very-diverse humans. [...] The founder population of today’s genetically not-very-diverse Sub-Saharan Africans shows signatures of a population crash, probably with a toll of 50% and probably from an effective breeding population of something like 50,000 people down to 25,000. So out of a founding population on the scale of a very small city 60,000-120,000 years ago, today’s 1.14 billion Sub-Saharan Africans have gone on to people every habitable space of that hugely varied continent. They are significantly more genetically diverse than their relatives on five other continents, but nowhere near as diverse as the neighbors in their midst. [...] 93-98.5% of the ancestry of humans outside of Sub-Saharan Africa (among those with no recent Sub-Saharan African ancestry, obviously) derives from a breeding population of 1,000 to 10,000, which expanded rapidly 60,000 years ago."
So this tells us that a) this measure of diversity is mostly sensitive to minimal sizes of ancient populations, b) people descending from most of those diverse clusters constitute a tiny fraction of African population, and are thus non-central cases of colloquial "Africans", c) the overwhelming majority of people of SSA ancestry descend from a single breeding population, which can be distinguished from other populations – including the one that had left Africa. The story is more complex, but the point is that this diversity appears not to be a good reason to not recognize [the majority of] Africans as a specific separate group.

4. Race isn't a valid construct, genetically speaking. It's not well defined". – but aren't we already talking of genomic ancestry? So this is a true but irrelevant objection. Now, people are of course free to believe that conventional self-reported "races", which are, as is often correctly said, social constructs, do not correspond to continental-level ancestry – although noisily in many cases. I think this is pretty absurd on its face, but anyway, Googling tells us "In mothers self-identified as Black and White, the imputed ancestry proportions were 77.6% African and 75.1% European respectively" in a "diverse" NYC sample, and I'd expect less cosmopolitan groups to show higher figures. However unfit race is for purposes of cutting-edge research, in the aggregate data it is robustly aligned with ancestry, which is well-defined.

5. Intelligence is not well defined. There's no single definition of intelligence on which people from different fields can agree. – blatantly misinterpreting. The cited paper states: "...Nevertheless, some definitions are clearly more concise, precise and general than others. Furthermore, it is clear that many of the definitions listed above are strongly related to each other and share many common features" and goes on to propose a unified definition: “Intelligence measures an agent’s ability to achieve goals in a wide range of environments.” Features such as the ability to learn and adapt, or to understand, are implicit in the above definition as these capacities enable an agent to succeed in a wide range of environments. Also it is not clear why we'd even need people from different fields (in this case, psychology and AI research!) to agree on a definition of intelligence to have a useful measurement of human smarts. And this is what has happened with IQ:

6. IQ has a number of flaws. It is by definition Gaussian without having appeared empirically first and the g construct itself has almost certainly no neurological basis and is purely an artifact of factor analysis. – this is just some Gish Gallop. To begin with, I don't see your link supporting your summarization – except the vague "number of flaws". If I may, where have you taken this list from? In any case, anything but God has a number of flaws; your link says that "According to Weiten, "IQ tests are valid measures of the kind of intelligence necessary to do well in academic work."" and "clinical psychologists generally regard IQ scores as having sufficient statistical validity for many clinical purposes". It doesn't seem like there's any scientific objection as to the validity of IQ as a measurement of what's casually called smarts and understood to be smarts in the context of this discussion – even though there are weird attempts to drown this fact in caveats. Why is the part about assumed Gaussian even relevant? What would it mean for g to have a neurological basis, and why would that matter in the discussion of HBD? ...And the part about g being "purely an artifact of factor analysis" is plain false, far as I can tell. It comes from Cosma Shalizi's essay that misstates the reason for the existence of positive manifold. "If I take any group of variables which are positively correlated, there will, as a matter of algebraic necessity, be a single dominant general factor... Since intelligence tests are made to correlate with each other, it follows trivially that there must appear to be a general factor of intelligence." This is just a lie: a great deal of effort has been devoted to making cognitive tests comprehensive and diverse assessments of ability, but positive correlations pop out on their own, even in research informed by Shalizi's assumptions, e.g. "The WJ-R was developed based on the idea that the g factor is a statistical artifact with no psychological relevance. Nevertheless, all of its subtests are intercorrelated and, when factor analyzed, it reveals a general factor that is no less prominent than those of more traditional IQ tests". And "...All 861 correlations are positive. Subtests of each IQ battery correlate positively not only with each other but also with the subtests of the other IQ batteries. This is, of course, something that the developers of the three different batteries could not have planned – and even if they could have, they would not have had any reason to do so, given their different theoretical presuppositions."

7. Twin studies are flawed in methodology. Twins, even identical twins, simply do not have exactly the same DNA. – again, misinterpreting; there are flaws but the method is not summarily "flawed" just because a section about flaws exists. The first link is a list of objections but in no way does it show or argue that they are decisive, or even apply at all to current methods (there are "responses to critiques" subsections). The second is apparently irrelevant, and was already addressed by another user.

8. Evolution isn't just mutations and natural selection. Not every trait is an adaptation. (a link to Wiki on "Evolution – Evolutionary processes") – ...okay but how does this even support your case? I'm honestly unsure what the idea here is. Taken literally, your summary suggests that evolution can produce maladaptive changes, so we cannot assume that all (or any) populations will be maximally fit (for their environment). This is a pro-eugenicist take, if anything. Whereas the page itself discusses mechanisms of change in allele frequency and does not have any clear impact on the validity of HBD one way or another.

9. Heritability does not imply genetic determinism. Many things are heritable and do not involve genes. These include epigenetic mechanisms, microbiota, or even environmental stress on germinal cells. – irrelevant/false. The link is to "Heritability – Controversies" with some nitpicks of unclear truth value. The second is a general overview of possible issues with heritability estimates. It does not weigh in on HBD and accepts the premise of variable genetic contributions to human intelligence: As a case in point, consider that both genes and environment have the potential to influence intelligence. Heritability could increase if genetic variation increases, causing individuals to show more phenotypic variation, like showing different levels of intelligence. On the other hand, heritability might also increase if the environmental variation decreases, causing individuals to show less phenotypic variation. This says, concretely, that in more equal environments we will observe more true genetic effects on variation in intelligence, so whatever differences in genetic effects on this trait there are between groups, they will become more pronounced. By the way this is terrible for the anti-HBD position because it means that the state of perfect environmental equality – one could say equality of opportunity – will collapse into genetic determinism (modulo random noise). Your own idea seems to be that non-genetic mechanisms of apparent heritability can be interrupted by a positive environmental intervention. What share of "heritable" variance can it explain, at a maximum? Like, concretely, to what extent do you think the racial IQ gap is explained by microbiota, epigenetic mechanisms and environmental stress on germinal cells? Those are all quantifiable and falsifiable claims, but you just gesture at them. At this point, a dedicated layman looks it up and sees that they can explain very little indeed.

10. We don't mate randomly, which is an assumption in many genetics studies. – irrelevant applause lights, "genetics bad". Which studies, and does this matter for HBD? I've watched the video; it discusses interactions between psychiatric disorders and such, and states that genetic correlations between traits may be inflated by assortative mating (i.e. people high in trait X marry people high in trait Y). Genetic correlation "is defined as the proportion of the heritability that is shared between two traits divided by the square root of the product of the heritability for each trait". What is meant here, concretely? Ancestry is not really a "heritable trait", is it? And race is just a category, plus a bad proxy for ancestry, as far as HBD is concerned.

11. HBD is not generally accepted in academia. – this is just an appeal to authority, plus misleading. It's a single highly technical paper by some Kevin Bird, "Department of Horticulture Michigan State University", can it be considered an authoritative source on what academia thinks? And from the abstract, it attacks a very strong form of HBD reasoning, using data that cannot plausibly be conclusive: Evidence for selection was evaluated using an excess variance test. Education associated variants were further evaluated for signals of selection by testing for excess genetic differentiation (Fst). Does it strike you as plausible that we know enough about "education associated variants" to impute effects of prehistoric selection on intelligence? This ought to mean that the science of genetics of intelligence is vastly more mature than people think, than you suggest, too, and that within-group intelligence heritability is understood really well! Why hasn't this made the news yet? (And how does this address obvious low-tech HBD arguments, such as admixture studies and adoption studies?)

12. Many public HBD figures have been found guilty of fraud. Cyril Burt would literally forge results, while Lynn would take the average of two neighboring countries' IQ in order to derive "data" from a country's unknown national IQ. – That's an isolated demand for rigor. What field doesn't commit fraud? Were public anti-HBD figures never found guilty of fraud? Is the fraud rate different enough to affect our priors? And your link does not show that Burt's forgery was positively proven, but it admits that figures of heritability arrived at by independent researchers do not differ from Burt's, so why should we care? Assuming that a layman could track it down from here, I'll allow myself to quote Richard Haier (The Neuroscience of Intelligence, Cambridge University press, 2017): Subsequent twin studies done by different investigators around the world with large samples arrive at an average value for the correlation of intelligence scores among identical twins raised apart of .75 (Plomin & Petrill, 1997). Burt’s value was .77. For comparison, based on 19 studies ranging in sample sizes between 26 and 1,300 identical twin pairs, the average value for identical twins raised together is about .86 (see Loehlin & Nichols, 1976, table 4.10, p. 39)... Thus, the .771 “fraud” ends with recognition of overwhelming data from independent researchers that are fully consistent with Burt’s analyses, flawed as they may have been. Any single study, or any one researcher, can be flawed, but the basic conclusion that genes play an important role in intelligence is consistently supported by data from numerous studies of twins, adoptees, and adopted twins. This is an excellent example of looking at the weight of evidence (recall my three laws from the Preface: no story is simple; no one study is definitive; it takes many years to sort out conflicting and inconsistent findings and establish a weight of evidence). ... The weight of evidence summarized in this chapter leaves no reasonable doubt. Only extreme ideologues are still in denial. As for Lynn's country data, well, the same logic applies. Do we have any more trustworthy data? Does it refute Lynn's? Then why not just refer to it instead? Please don't say that it's not very interesting and nobody has bothered to collect proper measurements, IQ and race (or rather, ethnicity) is literally the most painful question in modern science, and it's evident from such dramas that a great many researchers are emotionally invested in proving the relationship wrong.

Ultimately, exposure to this sort of content has done for me what it has done for this person:

[…] Well, OK, I could believe that; visible traits consistent over entire populations like skin color might differ systematically because of sexual selection or something, but why not leave IQ following the exact same bell curve in each population? There was no specific thing here that made me start to wonder, more a gradual undermining (Gould’s work like The Mismeasure of Man  being completely dishonest is one example - with enemies like that…) as I continued to read studies and wonder why Asian model minorities did so well, and a lack of really convincing counter-evidence like one would expect the last two decades to have produced - given the politics involved - if the idea were false. And one can always ask oneself: suppose that intelligence was meaningful, and did have a large genetic component, and the likely genetic ranking East Asians > Caucasian > Africans; in what way would the world, or the last millennium (eg the growth of the Asian tigers vs Africa, or the different experiences of discriminated-against minorities in the USA), look different than it does now?
But having said that, and admiring things like Plantinga’s free will defense, and the subtle logical issues in formulating it and the lack of any really concrete evidence for or against Jesus’s existence, do I take the basic question of God seriously? No. The theists’ rearguard attempts and ever more ingenious explanations and indirect pathways of reasons and touted miracles fundamentally do not add up to an existing whole. The universe does not look anything like a omni-benevolent/powerful/scient god was involved, a great deal of determined effort has failed to provide any convincing proof, there not being a god is consistent with all the observed processes and animal kingdom and natural events and material world we see, and so on. The persistence of the debate reflects more what motivated cognition can accomplish and the weakness of existing epistemology and debate.[…]

I want to make it perfectly clear: those question marks in my point-by-point do not actually indicate uncertainty. They could as well have been references to papers. The field really is about as advanced as Bird's study suggests – only in the direction he disapproves of. But this isn't the place for it, surely people can go to some edgier venue and ask for receipts. The point I'm trying to make is: you say "Okay, if there's anyone here who actually believes in HBD, here's a couple reasons why you shouldn't." On an ignorant but moderately skeptical person your little list can, and likely will, have an effect that's the opposite of what you intend to achieve. To "who actually believes in HBD", it's utterly unconvincing. If I may be so blunt, it's almost as sad as quasi-scientific gotchas of flat earthers.

And this is how all of anti-HBD rhetoric is, in my experience. It crumbles under basic scrutiny, links do not show what they are purported to show, there are simple misunderstandings of what terms mean, there is no coherent epistemology or a single model, there's suppression of inconvenient evidence, there's substitution of evidence with confident op-eds in Vox from people who are supposed to be experts (but whose legitimate work doesn't support their confident claims), there are cascades of internally inconsistent Gish Gallops and other fallacies; worst of all, the reader is assumed to just not be all that bright. It's a collection of purely reactive objections that might come across as persuasive to like-minded people, but are not battle-tested – and indicate general unwillingness to test one's beliefs.

I expect very little payoff from this labor. But it would be nice if EAs were to become a little more reserved on this topic, and at least stopped turning off potential recruits with irrefutable displays of irrationality.