Of course the problem is the right now rather than several generations hence. One reason for Islamic terrorism is there are too many Moslems. At least in the sense that the economies of Islamic countries cannot create enough jobs for all the young people coming of age. Consider that for the last fifty years, the population of all Moslem countries has tripled. That's population growth that is more than double the rate of the world as a whole, and about ten times the rate of Europe. It's about five times the rate in the United States.The problem with trying to have a Seventh Century culture in the 21st Century is that 21st Century technology keeps intruding, leading to the dissemmination of knowledge and that impacts the women radical Islam seeks to subjugate.
Many of those unemployed young men are angry, and making war is a typical activity of angry young men. But the women are not too happy either, and this is becoming one a major threat to Islamic terrorists. In Islamic societies, women's activities are greatly restricted. One thing they are encouraged to do is have lots of children. Many women in Islamic countries are rebelling against this. You don't hear much about this, because women don't rebel in the same loud, headline grabbing way that men do. What unhappy women often do is stop having children. Not so easy to do, you think? Well, think again.
The human mind seeks information and the human soul seeks freedom. Sometimes the only freedom a person may have is to withhold that which their dominators want, in the case of Muslim women, that is children.