South Park: 10 Worst Things Cartman Has Ever Done

Despite him treating people like crap, Cartman is a master at getting people to do what he wants them to. This resulted in him forming not one, but two cults.

The first being when his friends convinced him he'd turned ginger (red hair, pale skin and freckles) to teach him a lesson about how he treats people who are really like that. This ultimately backfires, and Cartman unites the ginger kids in the town, saying that they are the chosen people and everyone else are the freaks, organising a mass sacrifice to every child isn't ginger. This is only stopped after Kyle admits he made it up.

The second was the culmination of several episodes of pestering about Mel Gibson's Passion Of The Christ. He sets up the Mel Gibson Fan Club and organises a gathering of all who were affected by the film like he was. Dressed as a Nazi, he then plots to use the film as an excuse to incite people against the Jewish community for the killing of Jesus and exterminate them / put them into concentration camps.

And the people who are following him are too stupid to realize what's actually going, just having fun being apart of a parade shouting German phrases they don't understand.