Here's Mark Krikorian on Bloggingheads debating some of the implications of his new book with Shikha Dalmia
magazine. I don't always agree with Mark about some of these questions. That's why Marcus Epstein's article was called On Krikorian's New Case Against Immigration: What Was Wrong With The Old Case?
But he has a fairly subtle and useful point here—that skilled immigrants are less assimilable than unskilled immigrants and young people. That's because by the time you become a doctor or an engineer, your character and loyalties, what Mark calls a "modern national consciousness", are pretty much set.