Also agree with this, "The Cathedral" is utterly stupid and bankrupt as a metaphor... if one were going for a full-on assault against Unitarians, why not something like "The Potluck", or "The Pride Parade"? I get a bit of a Jew vibe too but bloggers on the whole tend to whiff of the Jew so I won't make any solid accusations.
But another problem I have with Moldbug's argument is that it is a little stupefying. Now Moldbug doesn't come right out and blame everything bad on these liberal universalists and their descendants, but he does seem to think they were up to no good in the name of good. This is unfortunately an easy pose for the sheltered modern conservative, who has no memory, not even a dim one, of slavery, child labor, poverty, disease, and all the other bad things that the liberal universalists had to confront in their day. And of course these problems did far more to shape their thinking than a particular denomination of Christianity, which I strongly believe had no real influence.
What Moldbug forgets is that people choose their religion in all important respects. Christianity has so many variations that one feels silly pointing this out. The Protestantism that Moldbug is talking about received the focus of its adherents, not the other way around. It is the ex post facto justification of the spirit that already existed. Why did the spirit ever exist? Moldbug has no answer--it's not in his books. Perhaps it was a random mutation.