Kids before they are taught racism.
@GtHawk I am not so sure that is true. Kids seem to hate/dislike/not trust anyone different than they are. For example,there are damn few 8 year old boys that like playing with girls.
Or the crap redheads with freckles have to put up with when they are small,children that stutter,etc,etc,etc.
I think this is a deeply embedded survival code in the human genes. People that look or speak different than you might be dangerous,so you avoid them if possible and attack them if you can't.
This,of course,changes in just a few years,and all they can think about is "playing" with girls.