How can prejudice arise from self-justification? Thanks?

Question

how can prejudice arise from self-justification?
Offer some examples of how group can assume an attude of superiority in order to justify illtreatment of others?

Do not be rude and not point-gaming please

Answer 1

Unless we are taught better it seems that people usually think they are better than someone else . It's as if we have to pick sides for some sort of Life game or something . Then we route for our team and are never good sports .
Thankfully I taught my children better , my Parents are terrible and I never agreed with them .