You know, a certain activity that southern whites used to engage in just might explain why large parts of the south are actually minority white.
I live in Iowa, a state which actually fought for the Union in the civil war, and its demographics are so white it borders on ridiculous. Even so, it was one of the most important swing states until recently.
Also, despite the relative absense of minorities, crime and other social problems didn't magically go away. Apparently, for the "bad side of town" white trash will do in a pinch. It's almost like poverty and lack of education are the root of society's ills, and not race. Hmm...