You hit on a good point. You've heard of the melting pot, a term which is denigrated by ignorant academic multiculturalists around the country. Over 300 foreign languages are spoken by Americans at home. The most intimate expression of any culture is its language. Unless immigrants continue to assimilate to an American culture, as they did up until about mid-century, we are going to become balkanized.
Immigrants are assimilating.
After all your whole state has only four million people. And in 1990 more than half of our foreign-born were not naturalized citizens. That's a bad sign, though not as bad as the problem in states such as California, Illinois, Texas, and New Jersey. But whether we like it or not, our national problem is Colorado's problem, and vice versa. The nation-state is dead, kaput.