A religion that calls for the murder and suppression of others until they conquer the world, is a religion that should be mocked and torn down by anybody who has a brain to think. By your standard Nazism could be qualified as a religion and treated as sacred.
If a religion can not stand up to criticism and facts it does not need to stand at all, nor does the government need to get involved upholding evil by making it unavailable to speech against it.
It is a good thing our Christian founders understood this, even if you do not.
If you want to fight Islam, go right ahead, and I am with you. Not a moment too soon. Just make sure there is enough dignity in the West worth fighting for when you're done with the cartoons.