I remember a lot of 'Catholics aren't real Christians' going on in the area at the time.
I grew up in Orange County--in Newport, actually--too, and I remember that attitude. Religion didn't come up a lot. I wasn't religious, though, so it's possible folks didn't talk about it much around me.
Still, I did run into some folks who were of a more evangelical bent who insisted Catholics were idol worshipers and so on and who also insisted Mormons weren't "real" Christians.
I had a few friends who were pretty devout Catholics. My mom was, I think, worried when I developed a desperate crush on an Italian boy in 8th grade She dropped some hints about how Catholicism teaches that women are inferior and that they don't think women should use birth control. The guy had no romantic interest in me anyway, but I think Mom was worried I might have sex with a Catholic boy who would refuse to wear a condom and therefore get me pregnant someday. Like I would ever have had sex with a guy under those conditions!
I was a bit curious about religion in middle school, because that's the age when I noticed my own family (which wasn't religious at all) was different from some of my friends' families, and I first encountered people who tried to convince me I "had" to believe in Jesus if I didn't want to go to Hell when I died. That scared me some, because they seemed so
sure. But then I thought about friends of the family who were Jewish or Hindu, and it didn't make sense they could go to hell just for being the "wrong" religion and not thinking Jesus was God.
This was the 80s, though, and my mild interest/curiosity about religion was quickly replaced once Reagan got elected and started pandering to the Moral Majority and promising to reverse every social change I'd been raised to think were good things and pretty much "settled" (like feminism, tolerance for gay people, reproductive freedom, affirmative action, and environmentalism). Religion became inextricably linked with theocracy and Conservative politics in my mind after that.
There were also evangelical groups that wanted very much to deprive us of rock music when I was a teen and in college. They had record burnings and things. There were some Christian students in my college dorm who didn't believe in dancing. They probably didn't let their kids read Harry Potter when it came out. None of them were Catholic, though.