I can guess, but do tell.
Can’t remember exactly, should have taken better notes at the sermon. but a Catholic kid goes to a Methodist church while staying with a friend. When the parent notices the kid staring at the very beautiful but austere sanctuary, the parent asks “Isn’t this a beautiful church?” the kid nods his head and says “Yeah, but who stole all of your gold and statues?”
That’s all there is to the joke. It’s no good if you have to explain it.8-)