The reference to sharia law takes me back to Saudi Arabia. The time I was there, a man was beheaded for assaulting an eight-year-old boy. The severity of the punishment struck me at the time, and the fact that they responded to it. I never heard anything regarding attacks on women, so there is a disparity.
My point is cautionary, that we don't start lumping religion and society in the same place. Throughout Africa, tribal wars have gone on for generations. Rape had been part of the punishment and part of the activity of war between the tribes. Now it seems to be far more systemic in nature. I'm very, very concerned. To turn that kind of thing around means turning a society around, not just the military. As you say, the court systems, the investigators can't stand up to it.
How do we reach society so that people don't wish to take part in such crimes no matter what the justification or the excuse? It's education.