African Americans have retained a pretty distinct identity throughout this time. There are a lot of shared cultural artifacts to be sure, but the existence of a completely distinct dialect of English with its own distinctive grammar is solid evidence that the cultural overlap is not complete.

I resent the implication that any claim of genetic differences amounts to racism. We need to be able to have a reasonable discussion about genetics that doesn't come with all the value judgments that people assign to different genotypes. It's a bald fact that there are genetic differences, and that shouldn't be controversial. The inferences we draw from that fact can be racist, but the fact itself is just a fact.

The only conclusion that I'm arguing for is that people are born and raised differently, and we should expect to see different outcomes as a result. It's pretty obvious that we have not yet reached the point where the differences in outcomes are due exclusively to different choices, but we should expect to eventually reach such a point!