Bismillah
Back in high school over half the girls I knew had been raped. Not scientific either but it made me very sad and sick to my stomach that some men are so base and evil.
"I think the current methodology is a monthly injection, which lowers testosterone and therefore sexual urges."
Was not saying it before, but to me this does show evidence that rape is not JUST a violent act. It is a VIOLENT sexual act. I think that trying to classify it as either solely violent or solely sexual inhibits our ability to understand this crime and Insha'Allah prevent it. I liken it to the different types of theft. There are those who steal and try to make sure no one sees them. Then there are those who steal by sticking a gun in a person's face, making the crime more evil. There are people who beat others. Then there are people who add the sexual element to their beating, making the crime all the more evil.
I think that they should just be killed. Like a dead branch on a tree, trim is so others can grow. If we allow too many dead limbs, it affects the health of the tree. And in this anology what caused the death of the branch spreads to others. Those who perpetrate on others usually have themselves been prepetrated on by another. Subhannallah, a contagious evil!
Peace