Isn't this bigotry?
I remember watching all of these shows on PBS as a kid, where one of the major themes was how people would judge other people by class or other surface signals, and how this could obscure the truth or leave good people unappreciated on their merits. Did people learn the lesson? I guess some people did, and some people didn't.
Here's my experience coming to the Bay Area, looking up from the bottom: There's more bigotry here. People judge you more quickly and more absolutely on a more shallow basis here than anywhere else I've lived. (With the exception of the Norwood neighborhood in Cincinnati.)