Trevor Phillips is right, Their culture is no more compatible with western free societies based on Juadao-Christian principles than the original Indian inhabitants of the America’s were.
Back then, wars were fought with atrocities on both sides...but ultimately the Indian nations lost, and either had to be abjectly defeated and placed on reservations, or destroyed and driven out, for them to go through the years of change it took for them to give up their ways.
Ultimately, most native Americans have done that...but (and this is a mistake IMHO after all of these years) the reservation system continues to this day.
Either the Muslim communities moving into the west and trying to establish themselves as separate communities are going to face the same, or they can choose, as many do, to move in and adopt the culture and lifestyle of the nations they are coming to and give up that incompatible culture a and the Sharia Law that defines it.
Nothing else will work. The cultural and the religious divides are simply too extremely different. If we do not awaken to this and insist on these types of measures in our immigration policies...we will be faced with the former, historical conditions as a result of those differences ultimately coming to a head.
My step-daughter married an American Indian. He is fully "Americanized," if that' the right word. He's a good husband and father. However, what we hear about his relatives still on the reservation is appalling: drunkenness, drugs, incest, even murder. We are glad he moved the family away from those influences. The Reservation system has been a disaster for those still living in it.