Canada and Pol Pot's Cambodia are our closest examples.

https://youtu.be/Zw1ucZEqQ78

1. Morally Relativist Nihilists jealously criticizing everything other people believe in.
2. A theory that cynically posits all social interactions come down to power. For the self serving purpose of obtaining power while acting morally superior.

Look at sociality in 19th century to now

Honestly, I think they would mostly focus on racial problems, and big corporations big a problem, they would be as extreme as today's left wing.

Its a interesting question something would have to challenge the decentralized national populist right even after apocalypse.
I dont think it would have such a direct link to modern leftism though its just to centralized on big cities and metropolitan ways of thinking stuff that cant survive warheads.

I wish I understood but my brain rots whenever I try listening to these people.
There goals are less consistent than natural disasters.

The Left's utopia has 3 principles:

1. Completely self determined identity without any negative feedback ever.
2. Complete personal freedom without any consequences.
3. Complete comfort without any responsibility.

That's obviously impossible. Their philosophy will actually lead to black trans North Korea.

Late the history telling us and my intuition most likely say with the history tell us about the future

With the internet, social movements regarding sexual identity, race, etc I could totally see a brave new world type dystopian society emerging in later years

I think a weak absolutism like pre revolution france before the entire house of cards falling apart is most likley.
Dystopias need legitimacy something western gouvernments are losing fast ESPECIALLY IN AMERICA.
That combined with so so many social disruptions like mass aplication of AI or space colonization make me
worry about the chaos a likley attempted at distopia will cause rather than the distopia surviving.