The answer is simple. They don’t want to. They did not migrate to Europe, Minnesota or Michigan with assimilation in mind. They are not here to embrace western culture. They are coming to embrace western wealth. Western culture and Islamic/Arabic have very little in common. And many Muslim migrants appear to have little interest in adapting to our way of life. Support for gay rights is non existent in the Islamic world. Women are still seen as inferior to a 12 year old boy and 50 year old men marrying 12 year old girls is not considered to be abhorrent. In fact, in Brunei the sentence for being gay has now gone from 10 years in prison to death by stoning. Who in the hell stones people to death? A culture who is stuck in the 7th century, that’s who. Liberal group think does not allow for criticism of Islam, so very few liberals will speak out against this (some will).
Ask yourself this: If you were to move to Brunei, Indonesia or Saudi Arabia, how long would it take before you started to embrace Islamic/Arabic culture? My guess is never. So why would you expect Islamic migrants to embrace our culture?