OK..I'll accept that..
I think most white people think they have a better chance of defusing the situation if their interlocutor is white, and most black people probably think they have a better chance of defusing the situation if their interlocutor is black.
A black guy probably would not like to think that he was backing down to or folding in the face of a white guy in a confrontation. It's an understandable feeling, and I think it leads to escalation of these kinds of things.