I won't defend the author; my opinions here fall mostly inline with your own. But I still wonder if there isn't something deeper...

Presenting something as fact is an extremely quick way to find out if you're wrong. It's much faster than asking a question. The impulse to correct is stronger than the one to answer. So I interpret the post as the blogger's subconscious attempt at verifying and normalizing his opinions.

In this way, a blog is mostly a self development tool. I should start one of my own, I think. I never have before because I lack the hubris to think that my little discoveries are novel enough that anyone else would care. But I see now, maybe that's not the point.