Muslims are a self-isolating community due to their religion. Unlike the Amish or groups like Hasidic Jews, they have an ideology of wanting to obtaining dominance. It is possible that Muslims of the second or third generation may be absorbed into the secular humanist mainstream culture. Not much of a choice, but if the children and grandchildren of Muslim immigrants become tattooed perverts rather than jihadis, it would be better for society than a Muslim majority impelling submission to sharia law.
In Europe, second or third generation Muslims tend to be radicalized. First generation Muslims usually tend to be hard working and they try to follow the rules so they can make it in the new country.