All my California relatives vote Democrat. None of them are immigrants. The fact is there are a lot of leftists there who have no grip on reality.
Yes, there are plenty of white liberals in California, but it doesn’t change the facts, and this applies to America in general, the core Americans still vote roughly the same, and the 1965 Immigration Act is what flipped America.
The Democrats have not won a majority of the white vote (nationally) since 1964, a sympathy vote for JFK.
In California, the Democrats and Republicans would still be fighting it out tooth and nail every election, and the California Dems would be far less hard left if it wasn’t for immigration.