I certainly don't deny that oscillation in the form of inconsistency or hypocrisy is possible, and indeed we should expect little more from right-wing populist groups. I just posted an article arguing that Trump is the epitome of postmodernism, so that would be relevant (first link below).

I've also written a lot on how conservatism is bound to be incoherent since it's anachronistic in being anti-modern. See the articles below for some examples.

I should also say that I'm not done looking at metamodernism. This article is indeed very general. I plan to look more closely at some metamodernist arguments.

https://aninjusticemag.com/trumps-the-real-postmodernist-b43ec434a49b?sk=1f6ebe7eccea1660a7453c3cc92348ea

https://medium.com/an-injustice/there-is-no-conservative-philosophy-80467082418f?sk=088b1b11aaaa3b52add3f8b67ca42e62

https://medium.com/an-injustice/speaker-mike-johnson-hides-the-medieval-essence-of-conservatism-ba9ecbb19b7a?sk=d0a16349e3c7b68fa2c7009d99f55e31

https://medium.com/an-injustice/maga-trumpers-and-hippies-make-strange-bedfellows-3e4bc331b735?sk=efccad73df1a21fdff848917b5f51639