Those who cast stones against us will not get stoned in return. ----The right thing is if a Christian, or a godless makes a movie, or write a book saying Mo was bad, all the Muslims can do to defend that insult to the Prophet is to make a movie or write a book defending their prophet or offending the offender!!!!!. They have no right to KILL the dude who offended them.
Since Mo was a purported prophet from god I would think he would have risen above the hoi polloi and left the child brides alone. I can't think of an instance where a child was made a bride in the Bible, though I'm no expert.