This is the big mistake people make with Islam. There is culture, and there is religion. In Saudia Arabia, they still cut your hands off if you steal, thats not in the Koran. And ofcoarse the modern day terrorists blowing themselves up killing innocents, that is not in the Koran either The Koran is actually very peacefull.
Its the natural law carried down from generation to generation that allow this brutality. If you went to Jordan, you would see that its alot like America, women walk around the street without scarves or hijabs (full dress) and they look much like how the women here look.
What I don't like about Islam is how it treats women with half the worth of a man, for example, every 2 women witnesses in Islamic court = 1 man witness.