Seriously, if somebody gets all huffy about somebody cracking a joke about their religion, they must not be that secure in their beliefs.
Well, at the end of the day, most of the believers are not sure at all on what they believe. This is not the question.
I have a problem with taxes exemption, circumcision of babies (they cannot consent), and all this crap. If we are allowed to make fun of it, maybe people will start to realize how crazy these beliefs are.
My opinion is that we (the whole secular world) should stop giving religion a high status. They are business, and should have to follow the rules.