The "victors" write the history, but the true stories tend to come out. America does not have a proud history, ours is bathed in blood.
Southern racism has always been capable of great viciousness and brutality. The little town I grew up in in north Florida had no Black residents, because all had been chased out, of if they would not go, killed during period 1910 to 1920 by a gang of white residents led by a man named Randall Rowe.
It's not confined to the south. The south just seems to more crude about it. A black news reporter said he would rather deal with southern racists because he knew what he was dealing with. That he never knew with the ones from the north. I don't have a clue which is true but I think I'd rather deal with the ones who kept their ignorant mouths shut.