In your opinion, what do you think is the most offensive South Park episode?

I personally love South Park, and praise Matt Stone and Trey Parker for not being afraid for standing up for what they believe. I know that this show has had a lot of controversies and gotten tons of criticism from parents, Catholics, Muslims, Scientologists, celebrities and others. There’s only been three episodes ever pulled off the air. The first one was the one making fun of Scientology, and it was pulled off because Tom Cruise threatened not to be in Mission Impossible III if it wasn’t. Isaac Hayes, the guy who plays Chef, also quit because of this episode, but has returned. The other two episodes were “200” and “201”, which both depicted uncensored images of Muhammad. What I don’t get is why these were pulled, but the episode “Super Best Friends”, which had Muhammad uncensored but in a good way, recieved no controversy whatsoever. So if you watch South Park, what episodes do you consider to be most offensive?