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
Consider that perhaps the reason most of us on the forum aren't agreeing with you- and the reason Bostrom himself repudiated his words- isn't the taboo around the belief, but rather that most of us think the evidence is unconvincing at best.
But most of us are not willing to have the object-level debate here for reasons such as politics being mindkiller, not wanting this to become a forum for debating taboo positions, and yes, internal and public perception of the community.
(I don't have survey data or anything, but I'd bet this is the case.)
If so, to the extent the majority of EA's tend to be right about things, you should update in that direction in lieu of having the thoughtful critiques of your position.