I was raised Catholic in a deeply Evengelical town. The little girls were saying out of the blue that I wasn’t Christian. I was like 8, they were like 6. They were absolutely parroting what their parents said, there’s no way the little girls I played with daily came up with that shit on their own, and since then I’ve noticed that’s one of the “protestant culture” things that gets passed around in those circles and occasionally escapes. That Catholics aren’t Christian because saints or whatever.

They get all wound up about the “pagan” elements of Catholicism then turn around and worship their dollar bill golden idols. Hypocrites!

But basically, Catholics get crapped on when there’s no other minority around and they are tired of talking about Jewish folks.

I don’t practice, I’m atheist, but in the USA from a culture perspective Catholics aren’t in the WASP good old boy group, even if you are otherwise white. And WASP types are happy to let you know it, although its less common than it was a few decades back.

Biden being Catholic, and JFK before him, is basically a dog whistle to certain rightwing groups to make them lose their shit, it’s just less obvious than, say, Obama being black esp if you don’t have a family background that would expose you to that stuff.

I grew up going to various Christian schools as a kid. While it wasn’t a common viewpoint, I did hear of it from time to time.

The reason behind it, to my knowledge, was that Catholic practices would often be significantly different from other denominations’ practices. The biggest thing I can think of is the veneration of and praying to saints.