Why do people leave CA? Because they don't like what it's becoming. So they move somewhere else. But it's not really what they want, either. What they want is maybe 75% Texas, 25% California. So they try to move Texas, not all the way to California, but in that direction. To the people in Texas, that feels like "trying to turn Texas into California".
People make the state as it is today, so those people are exactly the reason what made CA is becoming. No they don't want to do just 25%, they want to own it and do 100+% their way wherever they migrate to, it's called Stockholm Syndrome. After they destroy a new place, they will move on to yet another state, which is why I call epidemic.
I deduced it based on all the people I know who moved from CA to TX, I can tell you there are quite a lot of them. The pattern is quite obvious to me. Over time I adapted to it somehow by reminding myself to stay absolutely politically correct when I communicate with them, which also means, there is no way to develop any friendship at all when you have to act like a politician.