Islam is a totalitarian ideology that demands it's adherents wage war on all others until subdued. In Islam, the world is divided into Dar al Islam (house of Islam) and Dar al Harb (house of war). Any place where Islam dominates is the former and any place it doesn't is the latter. Rape has ALWAYS been an Islamic tradition to subdue the local population as it expands from Dar al Islam into Dar al Harb. It is what Mohammad did, it is what he ordered his men to do and it continues to be an integral function of Islamic expansion into non Islamic areas.