Boy you should really look into racism and ethnic violence in Europe, because I think you'd be shocked to learn that "black" and "white" DO actually mean things to Europeans. To be fair, Europe is a diverse place and I don't intend to paint with a broad brush; things are worse some places than others. But man, every time someone pops in and says "those are American problems" it makes me cringe.
Ethnic yes, but that includes lot of "violence" between whites of different nations. Swiss people look down on all surrounding "poorer" nations, Romanians vs Hungarians, etc.
