I lived in Miami for the better part of a year. Yes, there were different neighborhoods, but...
drive through a Democrat-dominated/owned black neighborhood, and you got stared at, spit at, even had thrown things at you, if you weren't black; drive through a mostly Republican Cuban neighborhood, and people came out to see if you needed directions, and if you asked for directions there was a good chance you'd get a glass of lemonade while you listened.
It was black Democrats who taught me racism. I was never racist till I experienced Miami, and got treated like the enemy because I wasn't black. And it was brown Republicans who taught me to rise above it.
But the interesting thing to me were the (Republican) Cuban neighborhoods where diversity was alive and healthy: Spanish Cubans, Mulatto Cubans, black Cubans, native Cubans, Chinese Cubans, each in their groupings, but also overlapping and blending. And when as a "gringo" I moved in among them, they didn't worry about the color of my skin or the kind of slang I used, or even how bad my Spanish was; all they worried about was how well I did whatever I did.
So judging from my experience in Miami -- and St. Louis, too, BTW -- and your posts, Musicman, it seems to me that the racism that blacks taught me is alive and well, so alive and well that it's taken for granted.
Where diversity means respect, and mingling, and working together, that's America. Where diversity means division... well, whatever it is, it isn't America -- and it isn't Clinton's Democrats a whole lot more than it's Huckabee's ReligioPublicans.