Yes they are, by saying the catholic church is a joke IS advocating a religious practice.
Reevaluate that statement. Becasuase its wrong. When you make a joke about something it doesnt mean your advocating something else. When people make jokes about the American government, we arent saying we want to stage a coup-de-tat and get another leader. When we make jokes about races it doesnt meant we want to round them up and exterminate them (although you might have something else to say about that, Hitler.) When you joke about something, or say something is a joke, your doing just that. Making a joke. Jokes are funny, hahah, Just like you saying you dont have sex with men. Its funny, so we all laugh.
Of course they are making those jokes for people to laugh at. But they are also saying their religious practice is superior to catholic practice.
If i was a catholic i would be incredibly offended. I'm just suprisd this movie hasn't caused more problems.
Imagine if a US movie were made satirizing Islamic religious practices. Every building in the US would have a plane through it in about 10 seconds after its release.