I would happily leave the fact that the Prophet Mohammad was a paedophile (and yes, a fifty year old man raping a nine year old girl is paedophilia) in the past, except for the fact that it has ramifications today. Most of the culturally Christian world has laws preventing the marriage of children. In the Islamic world, his proclivities are the reason that the sexual abuse of girl children through marriage is legal. Iran, for instance, has an age of consent for girls of nine. If the best - legal, state sanctioned - parallel in the Western world you can come up with come from the Middle Ages, the your argument is weak.