If you REALLY want to see a group that wishes to remain separate from the majority, that would be BLACK Americans, most of whom have been in this country alot longer than my own family.
And you are both missing the fact that Muslims are the biggest group that want to remain separate from American life, especially the constitutional part. They want Sharia law. So, now we have 3 groups in this country all clamoring for their own society, separate from American society. That is what diversity does, it divides and conquers.
"Scuse me?? I live in the heart of Mexas - less than 150 miles from the Mexican border. While I will concede that there are MANY, MANY Hispanics (and, as you point out most are first generation - which I interpret as being those who stayed AFTER Texas independence from Mexico) who have assimilated into American culture, I see massive numbers of Hispanics (and, I'm not categorizing by Mexican, Cuban bankers (?), or three-legged Venezualan anteaters, but I am addressing the general category of Hispanic) who establish cloistered communities within a larger community, who refuse any effort to learn English or assimilate into our culture and try being Americans first BEFORE they try to cram their culture and lifestyle on us.
The Hispanic culture (sez he, again speaking in generalities) has a rich history and much to offer the US. But, by the same token, so does the US.