Why religion shouldn't be protected ? It's clear that the only objective of this movie is to offend muslims, similar cases happened before and the reaction of the muslim world, it's a red line, and it shouldn't be crossed. Like i said before in no way the attacks are the best response.
And no one answered why no one should talk about the " holocaust " because if he do he's antisemite, or about blacks, he'd be considered racist, but when we are making fun of the Prophete, it's freedom of speech.