A half-century later, Rawlsian liberalism has fallen to wokeism, which has become powerful enough to overcome the cultural and procedural obstacles to establishing itself as the new ruling ideology, taking out the liberal framework that enabled its rise, and beginning its own campaign of repression.
Though you could say it was the American Revolution that set things off and that it merely took America 250 years to go through the progression that the French Revolution traveled in a mere 5 years.
That people believed it was more real than it actually was, is another matter. But this invites the question - was it really the social consensus? Or consensus among some subgroups of society that simply didn't run afoul of speech taboos?
(FWIW, I'm borderline free speech absolutist, so bear this in mind - I'm not arguing that extreme liberalism in these matters is a bad idea. Only that the past is not a good example of what it should be like, once you set the propaganda and cultural distortion aside.)
Nowadays, even believing something that half or more of the population believes is far outside of the Overton window and will ruin your career.
We're still quite a far way off from literally beheading people in the streets (and no, having your Twitter account banned is not even remotely comparable)
(I mean that we've regressed into repression)
This happens in every society. There is an official ideology and whether through central direction or self-organizing systems, that ideology is enforced. Occasional periods of lighter repression (when the official ideology is something like classical or Rawlsian liberalism) end up just being openings for more assertive ideologies to take control. America recently exited such a period.