We have been told by various religious representatives that rape is the result of bay rah rawi in media. Obscene films are causing people to undertake such actions. While it cannot be denied that the objectification of women in film leads to such crimes but this is extremely simplistic.
The development of our sexuality is a long process beginning in childhood and more or less solidified by young-adulthood. Those who take the criminal act of child rape are mentally insane. Something deeply troubling happens in their own childhood that warps, distorts, contorts the normal development of their normal sexuality. About 1/5 victims of sexual abuse as male children, in turn, become sexual abusers of other children. Where power, violence, and sexuality are contorted it produces such criminal behaviour.
This behaviour can happen in any instituation that stultifies the normal development of sexuality. The prevalence of pedophilia is a well-known result of the constrictive environment of religious seminaries in every major religion of the world.
Aside from the punishing the rapist and killer severely. We also have to take away violence in the lives of our children. This is the only way we can guarantee that the Zainab's of Pakistan will be safe.