Since he misunderstands the reason for that, it's hard to care what else he has to say.
Respectfully, I disagree. That he happened to be mistaken about one point does not undermine his others.
He added some interesting points to the discussion. I also got a chance, by phone, to clarify one if his misapprehensions: That I was speaking of whites as an underclass at this moment. I was not. I was, however, warning of the ripples of undercurrent that may make that a reality in my lifetime.