DO you really think poor white kids don't attack their teachers? They do. I've seen it and it never makes the news and they don't call the cops.
To the person who expressed some actual interest in those kids, I'd suggest listening to this episode of this american life. Bottom line they are poor kids whose parents have no parenting skills and don't teach them how to deal with the world. Short answer.
“When plunder becomes a way of life for a group of men in a society, over the course of time they create for themselves a legal system that authorizes it and a moral code that glorifies it." ~Frederic Bastiat