The last data I saw shows that more people left California for other states than came to California from other states.
Most of the California's population growth is from immigrants and newborns.
But no matter.
What you don't realize is that it doesn't matter where they come from--what matters is how crowded a place becomes and how diversified the population.
If you stuff a gazillion people into a house, especially if they all have different ideas about when to use the bathroom and when to have dinner and when to play loud music and when to sleep and which TV shows to watch and when to walk the dog and who gets to do it . . . you will have madness.
Then it becomes a matter of common sense survival to turn over individual freedom to a committee that will make and enforce laws governing when each of you are permitted to do something.
As with a house, so with a state or a country.
That's true now, but one meets so few California natives. We've been building up to this for a long time.