Your kind promotes a deeply disturbed worldview in which it is perfectly acceptable to demean and debase immigrants and their children for having the deeply discourteous desire to maintain cultural traditions or to fly the flag of their native country.
Here's the thing, though... if you're a person of Mexican descent who lives in the United States, that's obviously because you believe that the United States is a better country the Mexico*; so, why wouldn't you do everything in your power to assimilate to the country that you yourself (implicitly if not explicitly) recognize as superior?
I don't ask this in a snarky or condescending manner, by the way: as someone whose last immigrant ancestors came to this country around the turn of the twentieth century, I'm interested in seeing the outlook of those more in-touch with the immigrant experience.
*Incidentally, this line of thinking can be employed as a theological argument: If the God that Muhammad preached about really were the author of human history, wouldn't people from Christian countries be begging to immigrate to Muslim countries, not the other way around?