The Muslim immigrants as far as I could see did not contribute anything. The USA when I was growing up was much more wholesome and lovely. I grew up in a totally Wasp area [Orange County, Newport Beach] which and things were very nice. But we moved, and since then I have have to deal with all kinds of immigrants [not Jews] and they always use whatever power or positions they have to hurt Jews and Wasps. Always. I think Jews knew this, but thought that, "If we are nice to them, they will be nice back." But it never worked that way. Wasps I think went along with it because that was more or less the message they were getting in church.
More or less this is what I experienced in Israel with Sepharim that say openly the rights words, "We are all brothers," but if an Ashkenazic Jew is stupid enough to move into their neighborhood, he will soon find out otherwise. There will always be at least one or more that will take upon themselves the holy mission of getting rid of the Ashkenazic Jew no matter how long it takes and no matter the risk to himself. [Of course a Sephardi in an Ashkenazic neighborhood tries to behave better, until the number of Sephardim rises above a certain percent. It is thye same with Muslims. The soft jihad starts at around 15% and when their numbers get to around 30% then hard jihad begins. I learned this because I learned the history of Spain. in the Middle Ages and I have alwayys been facinated with the history of Europe in a real power way. If I see a book on Roman or any nation from Europe's history I feel a tremendous urge to grap it and learn it.]