Holy shit. This is a Tim & Eric sketch. Literally. They had a recurring sketch called "Uncle Muscle Hour" that always completely baffled me. "What's the point of these sketches?" I would ask myself. "These aren't inherently funny, they don't seem to be satirizing anything, they're just.... occasionally there."
Well, now I know where they came from. And I'm still baffled.
It never occurred to me, but you're right. Either Tim or Eric (or both) probably grew up in a house where they were forced to attend church regularly and the stuff they were forced to watch might have had an impact on their work. It's probably why I thought their show was funny, because they were mocking stuff that I had experienced and inherently understood.