If you ever studied sociology and/or psychology, ppl simply like to divide other people up into groups in order to simplify things (in their own minds)
Thus this lead too problem of group A vs group B vs group C; or "my group" vs "their group"
It's not just about skin color or race. Those groups can be based on anything like religious beliefs, education, job, social class, and other beliefs
(communists, jews, peseants, gays, NY Yankee fans, even Intel users!)
Of course ppl like the best for "my group" at the expense of "other groups" they also tend to overlook sepeate individuals in the "other group" and look at them as a unfamiliar mob instead
By the way, Intel users sux
<-- racist against Intel users
jking