In particular, I find the final point incredibly interesting: black men use the N-word to mean "buddy" and that black culture is becoming much more mainstream. As such others would like to use the vocabulary of black culture without being black.
One would imagine that the increased use of the vocab of black culture would lead to decreased racism. But, if it cannot be used because of the current stigma of non-blacks using the N-word, perhaps this stigma actually increases racism instead of decreasing it.