It’s true that California is more diverse than Spain. Absolutely. I found upper middle class San Diego too churchy for me. I don’t like the assumption some people make that you have to be a believer. I was in military circles, admittedly. So you’re right there, too. I shouldn’t have tarred California’s reputation with that accusation. It’s more of a general American problem once you leave the coasts.
Get German citizenship if you can. Even if you have to suck up a couple more years. With German citizenship many possibilities are open.