Father Maxi is the priest of South Park's Catholic church. He likes to preach about how Hell awaits most members of South Park, unless they're Catholic and confess their sins. Even so, he's got a few sins up his sleeves. Like having sex in the church confessional. However, he did lead the charge against the Holy Vatican law that permits priests to molest children -- going as far as finding the holy document and ripping it up.
Season 6: Red Hot Catholic Love
The parents of South Park decide to become atheists.