My verdict a year later and with some distance: the post is fine. There's nothing at all in it to warrant the reactions it got. There's nothing at all in it to justify the accusations thrown at me.
My views on the topic have changed a little since I made the post, but not much, and not for any of the reasons I was theoretically attacked for.
What's the upshot of all this? Nothing really. I'm certainly not going to go back to the people who lambasted me and say "I'm still right." But it does make me feel a little better about an episode that really hurt at the time.
It wasn't my fault. They were just being a bunch of jerks. I can get over that.