In regard to social issues, such as the murder rate by race you cited earlier, I'm not compelled to believe blacks are genetically wired to behave poorly and kill more often. Rather, as I've said, I believe there has been an extreme set of circumstances in the U.S. that have led to lots of problems.

You and Lumifer have two different theories to explain the difference in murder rate. The rational way to resolve this dispute is to look at areas where the two theories make different predictions and see which set of predictions is correct. This is more or less what Lumifer has been doing in this thread. You have been coming up with incresingly flimsy rationalizations to avoid coming to the obvious conclusions. Furthermore, the only prediction you've made using your theory, the continued existence of "racist attitudes" against blacks, is something Lumifer's theory also predicts.