> It's funny that he refuses to admit any fault in what he said

Fault as in he regrets it?, or would have done it differently another time? If his goal was to get people to discuss this topic, how could he have done much better?

> ideological rigidity and refusing to entertain other people's ideas in good faith is exactly what he's complaining about

I don't think you can fault him for the rigidity or not entertain other people's ideas. It wasn't perfect or even great in either direction, but it surely made more effort than the many internet discussions, which we don't find fault with.