if he feels that way only about AAE, and not about more "white" sociolects with low prestige. And even if he does, it would be a prejudice against a cultural community more than against an actual race - not all black Americans speak AAE, and black foreigners obviously don't at all. Of course, if we're gonna go down that route, you could probably dismiss 80% or more of "racist" views or statements as not being strictly based on race, leaving only actual white supremacists as genuine racists.