You've got to see this video. It is from an ABC News 20/20 segment and shows mostly white kids picking a White Male Criminal -- Oklahoma City bomber Timothy McVey -- over a standard, athletic looking Black man, with the idea that the White man was "nice" and a "teacher" where the Black man looked "mean" and "bad."
Where do you suppose they learn those ideas from? It's from home, and parents don't teach their kids how to better think about people and the World around them. Thus, racism is allowed to grow and fester and becomes expressed in paranoid delusion -- a mental illness that must be stamped out.