I know what a Hasidic Jew dresses like, Red. But I'm not familiar with the conflicts of the NY community with integration into American life.
I think talking about the European situation IN CONTEXT is important. So I can't help but find most of your examples irrelevant. The acceptable balance between integration and individual cultures in the United States is completely different from an appropriate balance in Europe, and the examples you bring up are not at all similar to the Europeans.
The closest population in the US in similarity would, I think, be the new Hispanic immigrants because of its a highly concentrated population and the language and cultural barriers. But even that is so dissimilar that it isn't a very useful comparison.