A black person arguing that whites are genetically predisposed to certain behavior is a dangerous argument to make. Because the actual white supremacists have been saying stuff about the genetics of race and behavior for a long time. It's a really bad idea to legitimize that kind of thinking. It might win them a battle, but it will lose them the war if they want to go down that road.
We've already had an infatuation with eugenics in the past. We don't need to open that can of worms again. Hell, Nazi Germany based some of their ideas about race on the work of American eugenicists. This idea that "whiteness" is the problem is playing with fire.