Some Muslims still think their religion is entitled to immunity from ridicule.

"Don't ridicule our views, or I will attack you" is an explicit threat of violence. "Don't ridicule our views, or some of us might go crazy and attack you" is a slightly veiled threat of violence.

Slavoj Žižek: Murderous extremists kill because they are insecure about the beliefs they insist on; they have incorporated into their minds some of the secular attitudes they say they oppose.

The beginning is a great explanation of why "You shouldn't say such provocative things about Muslims" is comparable to "You shouldn't wear such provocative clothing."