You seem to not understand the segregation in the South. If you're black, you're not going to be well-accepted if you move into an upper middle-class all-white

You seem to not understand the segregation in the South. If you're black, you're not going to be well-accepted if you move into an upper middle-class all-white neighborhood. Yeah, there's lots of black people in Atlanta, but they live "on the other side of the tracks", in all-black (and poor) neighborhoods. Of course, racism exists everywhere, but it's generally worse in the South. A black guy moving into a nice neighborhood in Silicon Valley isn't going to have that problem; his main problem will be feeling isolated because he's the only black guy, and all his friends, neighbors, and coworkers come from a different (sub)culture than him.