Yeah his take is very interesting, but I think it's also very personal, very much coming from his own personal milieu (which contains a lot of very reactionary right wing folks...). I think it's an example of what I meant by saying this conventional wisdom seems to be more informed by "vibes" more so than data. It's definitely true that the SSC and pg crowds have are deeply convinced that this is a problem unique to the left, I'm just skeptical that their belief is as factually based as they might think. The SSC article does a good job of incorporating this uncertainty, but the OP does not, in my view.