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
I don't fault you for not reading it all, but it is a good resource for looking up specific topics. (I have summarized a few of the points here.) And I don't think IQ is a flawed measure, since it is an important predictor for many measures of life success. Average national IQ is also fairly strongly correlated with measures of national welfare such as per Capita GDP.
To be clear, I'm not saying studying this question is more important than anything else, just that research on it should not be suppressed, whatever the truth may be. This point was perhaps best put in the conclusion of this great paper on the topic: