He wasn't even saying that African-Americans have a predisposition for criminality. It certainly has nothing to do with their genetics or race.
Why is it that immigrants from African countries - really sucky African countries, where you can hardly drive from home to work without being robbed, and people sleep with shotguns under their pillows - are, statistically, wealthier on average and less likely to commit crimes than those Americans who descend from slaves?
Are those Africans somehow 'less black'?
If it is racism that causes this - would racists somehow be able to distinguish thse immigrants from 'local' African-Americans and hate them less? No?
Then maybe it isn't racism.