Prejudice, of all sorts, is part of human identity, and racial prejudice is one of the most basic and visceral. I believe that none of us is completely free of some furtive, subconscious feeling that a certain sort of human being is...well, different... and unpleasantly so. This is presumably atavistic: we"re probably programmed at a genetic level to identify with "our" group, and so reject the "other" groups. Tribal...