Why are Atheists afraid to insult Islam and Jews?

[Cephus]

I'm certainly not afraid, I've got no problem going after the Jews and the Muslims and the Buddhists and any other religion on the planet.  It isn't a matter of being afraid, it's that most atheists in the western world have only limited interaction with non-Christian religions.  We attack what we know best.  That doesn't mean any other religion doesn't get criticized when the need arises.