"Do they insult atheism, paganism, secularism, and moral relativism as well?"
As a matter of fact, yes, they do... the DESTROYED athiesm worse than almost almost anyone else in the history of the show... and I wont even begin to get into what they did to Peta... South Park RULES!
Just a few weeks ago they trashed Scientology. "Tom Cruise won't come out of the closet!"