I've seen jokes about Catholics on Twitter. Christians in general have been called everything from crazy to dangerous by the Mainstream Media. If you believe in Jesus Christ as your Redeemer, you'll often find yourself as the center of jokes and chastisement.
I've seen some Facebook fanatics knock Jews. Forget about Abraham, Jacob, Moses, and ancient Hebrew Prophets! They are fair game for jokes and smut.
BUT...if you say something hurtful about Islam...Obama will get you. The Obama Department of Justice has made it clear that Islam must be protected against insults! So when will Barack Obama come out of the closet?
Read more about DOJ and stay clear of Muslim bashing...