Well, they get that label from the trumpets around here. I'm sure they aren't all left wing nutjobs, and considering they are leaving CA, that may be a sign they aren't. But in TX, anyone who wants to live in the Austin area automatically gets the "liberal" label from the majority of rural folk.
Not all, but likely most. Lots of people are leaving CA due to the massive appreciation they have experienced in real estate and most of that has occurred in the more coastal/liberal areas. CA money goes a long way almost everywhere else in the US
This will likely come as a surprise to many on this board, but lots of people don't look at the political leanings of an area as a significant criterion when considering a move.