The comments above include suggest this as the thread under discussion.

That link is not provided by the OP, though, so it's possible they meant something else. OTOH, Googling site:http://lesswrong.com "Ayn rand derangement syndrome" only turns up that thread, so it seems likely referent. (To my amazement, removing the site parameter still only turns up that thread, which seems implausible... is this some kind of automatic Google-tuning? Do others get the same result?)

For my own part, I think a charitable reading of the OP's summary is close enough to accurate, but in the context of their comments more generally I'm no longer willing to extend them the benefit of the doubt implied by a charitable reading.