Our daughter, now forty, had her first three years of schooling in a Montessori school in a university town. She came home chattering constantly about her various friends. We had no idea what their race, skin color, or nationality was until the first parents' night. Of course we already knew some of their parents; an extremely well educated Indian female friend (long background there, with a vast difference for most women in her culture) had been the one to recommend Montessori to me. Later our daughter found, of course, that a lot of prejudice still existed in her generation.

Until white people stop feeling superior to others of color.
If your dirt poor but white then by golly your better than "them".
I truly think this is how it starts and then it festers! Then it keeps spreading for no reason except the desire to feel your better than someone else.

It was the perfect set-up for keeping poor whites in line. Not to excuse the North, but racism took much more convoluted angles there. Not at all good, as no one can be more vicious than a Caucasian who needs someone to blame for their own exploitation. Somewhat explains "working class" Republicans.