Funny stuff. In essence, he’s saying that the Western Left engages in mass cognitive dissonance. They just simply aren’t sane.
It’s only cognitive dissonance if you believe that the Left’s real agenda is promoting social liberalism for its own sake. It isn’t. Their agenda is destroying America and European countries. This means supporting multiculturalism and social liberalism domestically while supporting nationalism and social conservatism among racial minorities at home and enemy nations abroad. From that angle, their strategy makes perfect sense.