This has happened before. Read The History Man by Bradbury.

And what will happen is that being "politically unreasonable" will be unfashionable and the society will swing to an equilibrium once again. The extremists will leave or retire and the people who kept their heads down will say "they were a silly bunch". In the UK they were labelled "The Loony Left" and subject to much comedy.

To suggest that it's either one extreme or the other isn't how things will work.