Look beyond the labels. Yes, sometimes a white person that grew up among black people is more black than a black person who grew up with only white people. Think about half-white, half-black people, why aren't people talking about mixed race people? Why do mixed race people often choose what side to identify with? Because "black" and "white" is just sub-cultures within American culture. Yes there is a correlation with physical trait, but this correlation is misleading and was started by our ignorant ancestors that lived in a world that is completely different from today.

Dark skin alone doesn't make you black, and I know I'm right because there are plenty of dark skinned foreigners that complain they get lumped in with black people when they're actually Arabs or something else. This is even worse for white people. Italians and Russians are in the same category, and that really makes no sense. Skin color should just be forgotten altogether.