An interesting take on the immigration issue. What Nicholas Provenzo describes here is just another form of collectivism, which he identifies specifically as xenophobia. I agree, for the most part.
It's somewhat incidental to Provenzo's essay, but living in Southern California, I can say that many immigrants (legal or otherwise) would benefit greatly from learning the English language. I think many don't because they have no intention to stay for very long. Others don't because they isolate themselves in Latino enclaves where they don't have any reason to learn English, which is of course perfectly within their rights but it necessarily limits their opportunities.
And that little bit is irrelevant, practically speaking, because even that propensity doesn't last long. By about the 2nd or 3rd generation, the assimilation has already pretty much concluded.