Actually, that's one of the most recent developments in California's history. And it's a reaction to the reality of California's past - when California had some of the first and most onerous alien laws in the country. In fact, Earl Warren and the Brown family made political careers out of guilt tripping Californians for those laws.
And if by "ethnically diverse" you mean a majority Mexican population, I have no idea how that qualifies as "diversity". Sounds rather monotone to me.
See ya, Arnie. Deportation is an option, and is in fact our law (note the "our" part).
Funny how the California Recall candidates have basically come down to two illegal aliens and one American.
I'm planning on voting for the American.