Effective altruism is based on the core belief that all people count equally. We unequivocally condemn Nick Bostrom’s recklessly flawed and reprehensible words. We reject this unacceptable racist language, and the callous discussion of ideas that can and have harmed Black people. It is fundamentally inconsistent with our mission of building an inclusive and welcoming community.
— The Centre for Effective Altruism
Given my priors and respect for my leisure time I'm not going to read those giant threads. I won't downvote you since I haven't actually read it, but let me ask you a related question:
Do you think that out of the billions of possible correlations in the social sciences, the best use of our finite time on earth is to study this one?
The incredibly flawed measure of 'low iq' is correlated with the arbitrary socially-contingent western category of 'black people' (almost certainly because of environmental factors). But there are millions of things correlated with the western category of 'black people' and there are millions of things correlated with 'iq'.
Furthermore, there are so many more variables to study that are less flawed and less arbitrary, why should we focus on the one correlation out of billions that racist people –who want to make the world worse for out fellow human beings– want to us to talk about?