black people in particular (and Native Americans) are very EXclusive rather than inclusive... that needs to be dissolved from both sides, not just one, if AS A RACE black people want to be treated as equals... Things like ebonics, the so-called pimp-limp, BUFU clothes, and many others serve only to emphasize differences... As long as you have an in-group/out-group dynamic it's bound to go both ways.

This is also a function of class, and to a lesser extent, age and gender. Every young black man I've ever seen in Hamtramck seems to behave as you describe, along with a lot of the women (I'm not sure it's as exclusionary as you think, though -- they're pretty nasty to each other, too). My son's school, on the other hand, is majority black (or maybe biracial), and none of the parents or teachers are like that at all.