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I'm saying when any larger group of people moves to another country where they're not too familiar with the culture, they tend to form subcultures, which can become parallel societies. You know how descendents of Jewish immigrants in America often like to celebrate their holidays together and have close communities. But they still aren't "refusing to integrate inot society", at least not any more than you are "refusing to integrate" by not practicing cultural judeaism from now on out.

Paralell societies can create cultural divisions, but they're not always the end of the world. I hope I don't have to tell you that most people of Southern American descent don't go around showing their middle finger to strangers all the time, or that most people of Arabian descent don't want whatever Sarsour wants. Sure, there may be some aspcets of parallel societies, but that is actually the opposite of "trying to force their won ways onto everyone". They just live and if you like parts of their culture you adopt them. Live and let live.

Sarsour is the child of immigrants, I can show you tons of Americans who are also children of immigrants who have great ideas for America, that you probably also agree with. Just because they came from like Sweden and Poland, instead of the Middle East or Mexico shouldn't make much of a difference, should it?

Initially, German immigrants also "refused to assimilate" if you will, with their own newspapers, bars etc. Slowly though, those parallel societies dissolved as people moved in and out of those areas