...I think it's because many of them are lost souls who do not remember where they originally migrated from. Therefore, they cannot identify with any other rich and beautiful cultures, so they choose to believe the lie that they are superior yet in reality are deeply envious and insecure.
Besides the ignorant and hateful y8 supremacists (a contradiction in itself) there are the American Folk artists and country western singers/musicians who have overcome and developed their own culture unique of it's own. Which is a beautiful thing.
It's the other hateful minds that have not figured out that it takes a lot more courage to love and have compassion than it does to hate people who are different. Sadly, they remain cowards.