If you insist they give up their culture immediately you will be seen as trying to take away their culture. Just like how gun rights advocates perceive attacks on gun culture.
Solidarity is a normal reaction to real or perceived hostility. In history the social pressure to assimilate resulted in immigrant collectivism in order to support each other; Chinatowns, little Italy and a myriad other ethnic enclaves formed partly because of this pressure.
The collectivism is what helps them keep their culture while they assimilate. This new wave of "accept the Muslims" is totally different because of the weak, everyone get a participation award, mentality. Muslims are not assimilating at all, yet want everyone else to live the way they do! Believe the same things they do. I see it day in and out. When you've worked in a Muslim dense area for a few years please come back and tell us what you've seen.