I did see the episode in question and it just wasn't funny IMHO.(too gross out even for me LOL) I am not Catholic, so, I would have a hard time being offended. I do note the difference in reaction from a civilized religion such as Catholicism and the reaction to very tame cartoons from the followers of Moe Hammad.
You should have seen the Osama bin Laden episode, which was a great homage to the Warner Brothers cartoons.