I know a black sargent major who came from one of the poorest parts of the South, from a very poor family ---descended from former slaves --he could also have had seeds of resentments of whites. He stayed with the Baptist church and is a successful man --- there is no way he would have done something like this guy did. I don't think being black figures into this at all ----besides Colin Powell himself is black, he probably has some things he could be resentful of. Islam takes that resentment and feeds it.