It's one thing to come to another country seeking a better life and finding resistance and some stereotyping. It's quite another to be plucked from your land and enslaved for 300 years, then treated like you weren't smart enough to avoid it, and the cultural chaos and inevitable life choices that goes with it. If you're a white child, even a poor one, you look around you and see a history that involves people that look like you, your parents don't talk about segregation or being afraid for their lives, or being forced to eat, sleep, drink and live in different conditions/areas than whites. You don't have the "them not us" feeling because you don't have any reason to see yourself as less than them. So you might just end up seeing them as less than you, especially if you're taught that, and they feeling your air of superiority will resent you for it, and they will close ranks and protect themselves and each other. No surprise that happened, no surprise it's still happening since the only real change has been inclusion. The old school mentality still rules the roost.