It may well be that I misinterpreted the comment and if so, I’ll retract what I believe it insinuated.
A big part of the reason white Americans have been willing to go along with policies that are prejudicial on their face, such as affirmative action, is that they do not view themselves as a tribe. Given the inequality of resources favoring whites in our society, it is a good thing that white people view themselves as the ones without an accent. Should that change, white privilege (whatever one views that to be) will not be eviscerated — it will be entrenched.
The author’s opinion about this development notwithstanding, it is perceptive. The center, so to speak, will not hold. And, in lieu of any actual data to the contrary, nor should it: it is becoming quite apparent to a growing group that diversity destroys social cohesion.
Update (20160604): Well, I’ll be… a rejoinder:
The answer [to my contention] is ‘yes and no’. ‘Yes’, because Wobbly has been expressing racist opinions here for years. ‘No’, because the topic was immigration, and reasonable people can disagree on immigration for reasons that have nothing to do with race or ethnicity. Racists are not reasonable people, though. (I hope this is aggressive enough to make up for the passive part in my previous comment to Wobbly – the only reason for which was that there is simply no point in arguing with racists).
Indeed. And vice-versa.