Why?
Some of those guys certainly seem irrational and stuck in their ways, but... to be honest, if there are any coherent responses to Moldbug & co. I have yet to see them. It's not like there's a whole bunch of literature that they're stubbornly ignoring. If you actually brought them rational arguments that they were forced to confront, I think at least some of them would update their beliefs - this is LessWrong, after all.
EDIT: In response to your edit: (For those reading, it initially just said "I doubt this very much.")
The differences between the far-right faction and the progressives (among whom I count myself) on this website are not primarily of the sort that can be bridged by intelligent argument, for a number of reasons.
This doesn't seem obvious to me. Could you list those reasons?
It's not like there's a whole bunch of literature that they're stubbornly ignoring.
The mainstream of political philosophy and political science is pretty much opposed to their positions. While none of it specifically addresses the topics covered by Molbuggians and neo-reactionaries in the terms they use, the burden of proof seems to be on them to prove there is something massively wrong with the mainstream before the mainstream has to specifically craft responses to their arguments.
(For reference here's an example of what I mean by mainstream 'progres...
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Of course, for "every Monday", the last one should have been dated July 22-28. *cough*