It's not about "complaining", its about not assimilating. It's about demanding that their cultures, supersede that of America's. It's about leftists that accuse anyone of supporting American culture as some how being intolerant, bigoted, & racist, such as when English is advocated as being the designated primary language. Nothing in that claims no other languages can be spoken, but all the irrational hyperbole you see in response, is just how horrible such an idea is
The U.S. became a superpower because of our freedoms, and how we chose to run our country, based on that. It's spawned entrepreneurship, investment, and initiative, that did tap our resources. With very little Government, I might add. And those who came here to participate in that spawning, whether they were "the rich", or just immigrant poor, came here with the expectation of becoming American, and embracing what it meant to be an American. NOT, America will bow down to my culture