People always overreact to this stuff. He’s not saying “black people are stupid” and here’s why: There’s way more variation among group members than there is difference between group means. So while research like this is worth doing, it’s only meaningful in the aggregate, it’s not basis for assuming anything about individual group members of whatever race. People need to get their panties out of a twist.
For decades, we have had people saying that any statistical variation in hiring, college admissions, or pay which negatively affected blacks was proof of racial discrimination.