^White and black mean a lot more when you're not white.
I come from a town that was center stage in the Civil Rights movement, where every local election is a race war. Believe me, I know what they mean as contrasts. It's like Jerusalem around here, but with fewer bombs. But blackness by itself, outside the confines of America's race history, doesn't mean anything. African-Americans are nothing like blacks in Africa, aside from physical appearance. Rural blacks and whites have more in common with one another than rural whites and urban whites. Local cultures matter more than skin tone.