Then why just do a drive-by on it, bud?
I've got my own reservations about some aspects of it; in particular, the author's overlooking of the possibility that these newcomers have the option to adopt the key tenets of our culture, while retaining the non-conflicting aspects of their own. I served on a jury where the defendant's barrister argued that his client's crime of assaulting his wife (for alleged, [doubtful] adultery) was perfectly acceptable behaviour in the country of his birth (Turkey.) The Court didn't buy that, but this sort of argument is creeping into current affairs here often now; and becoming accepted, through repetition.