As I said, it wasn't one small part. And I'm sure the experiences a foreigner makes differ from the experiences a native makes. And still many natives I met agreed with me on this issue. So it's not like I'm imagining this. To say that there is no prejudice in the South has to be denial to a certain degree. I'm happy for you that you made mostly positive experiences, but that doesn't go for others. The black kids in my highschools certainly wouldn't agree with you.
That said, put the beer in the fridge, I'm on my way.