I read the area that talks about race. 1. This only mentions African americans, who are mixed West Africans and are a tiny portion of the black race. 2. It specifically says that black people's scores on tests have improved since the 1970s. Around the time they got civil rights. So this is to do with poverty and systemic oppression (the combination of these, and cultural impacts of these, not JUST socioeconomic factors), not race. The statement "blacks are stupider than whites" is very different to "African Americans do worse in tests due the legacy of systemic racism". This is why Bostrom updated his comments to say exactly that.
I mean, you're extrapolating much more than the evidence warrants. Everyone on all sides of this debate believe environment has some significant role in measured IQ. So the fact that the IQ gap has reduced since African American's material condition has improved does not imply the entire gap is due to environmental influences.
You're also changing the subject. The issue is whether the widely accepted Black-White IQ gap exculpates Bostrom of the charge of racism. The question of the source of the IQ gap is a separate issue. Whether that source turns out to be fully environmental or only partially is a separate concern.
As I've said, I don't consider Bostrom as a racist, I consider him as an idiot because he felt for the first scientific quackery that sounds edgy.
Even in 1996, it was obvious that "Blacks are less smart than Whites" is incredibly scientifically stupid, the same way that saying not long ago "LK-99 superconductor is a game changer, and people who are skeptics are wrong". In 1996, it was clear for anyone who look more than 10 minutes that the situation was way muddier than Bostrom realised, and that Bostrom is as stupid as the idiots who jumped on the LK-99 superconductor craze without waiting for more info.
