Nice piece but I think he may be overlooking the Left’s cynicism when it comes to their emphasis on ethnic differences and the virtues of other cultures. I think for them this is mostly tactical, a means to stymie and weaken the one traditional culture they hate (because it truly threatens their “progress”), namely that of conservative Christianity in its various forms. If they could snap their fingers and turn the whole world into snooty atheist/agnostic post-modern hipsters just like they are, they would do it without blinking.
There is no question that is certainly true with some of them for sure.