I don't agree with this. What is happening in the Muslim world is that some of its stricter interpretations are being foisted on Muslim communities either insidiously in the background through money (Saudi Arabia) or through fear and violence (Iran). There was never one Muslim culture; it differed around the world. For example, in Europe Bosnian Muslims did not dress anything like the way Muslims often dress in places like Saudi Arabia. When I was at school we had a significant number of Muslims in our school. They were quite accepting of our culture. Muslim lads were often to be found at the same parties as us. Muslim girls differed in one way from non-Muslim girls. They wore trousers rather than skirts. They did not wear head scarves. All islam requires is modest dress, not head covereings or women covering their faces. What has happened? I'm still not sure. But, those same men are now making their wives, daughters and mothers adopt and follow a more strict interpretation of Islam even though their own parents had allowed them to live a less strict lifestyle.