The phrase "DUH" comes to mind. Sounds like you need to get out more.
I don''t think anyone really thinks any "China Town" in the US is as good or better than the REAL China. The same can be said for little; Amsterdam, Athens, Berlin, Dublin, Havana, Rome, San Juan, Stockholm, Wausau, ..., etc.
BTW, NYC was called "America''s melting pot", especially before the days of air-travel. However, the USA was not the first, nor the last country to have large imigrant populations on their shores. Austria, Australia, Belgium, England, Denmark, France, Finland, Germany, Greece, Israel, Italy, Netherlands, Norway, Sweeden, Tailand, and many other countries have (and continue to) experienced large influxes of foreigners trying to establish residence and ultimate citizenship in their respective country. Some ogf them have had imigration problems long before the US was a country. Heck, a few were having imigration problems before Christopher Columbus was born!
Take the blinders off open a history book. You just might learn something. I advise you do it before you open your mouth overseas.
~ Happy sails to you ~ _/) ~