I have a sense that California is singularly skewed in this way, however. I've seen a rural lawyer in California advise people to basically hide their cultural identity while driving.
It doesn't fit neatly into 21st century American domestic political discourse (with emphasis since 2000 on red states vs. blue states), but we're really more interspersed than we believe, at varying proportions.
The time to worry is when you have scapegoating of certain minorities expressed in law and government behavior. The time to worry, is then the authorities have decided it's now alright to trample on the rights of a subset of its own citizens, regardless of their innocence.