Nobody is denying these people the right to speak openly, and it's ridiculous to paint with this broad of a brush. The overwhelming majority people are perfectly decent, have normal lives, and don't go around making violent threats or spreading absurd, easily disproven conspiracy theories.

There is an infinitesimal minority who are toxic, deluded extremists. Giving them equal footing on huge platforms with global reach helps them spread their poisonous ideas to a still-minority, but vastly larger group. That subsequent small minority which they infect are able to wreak much greater havoc. Parler was a perfect example of this in action.

> Human societies are cyclical, repeatable, and to some degree, predictable.

To this point, I would direct your attention to the Rwandan genocide, a perfect example of what can happen when you give a mass media platform to people who advocate murderous extremism. The genocide was incited by extremist radio shows spouting conspiracy theories and hatred.

I've read quite a few, and they don't bear out your description at all.

> Human societies are cyclical, repeatable, and to some degree, predictable.

Not really, not really, and really not.

> At least 75,000,000 people think one way

74,222,593 people conclude, for a wide variety of different reasons, at a particular point in time, to vote for a particular candidate. But even those 74,222,593 people don't “think one way”; if that wasn't obvious from, oh, actually listening to them at the time or having a basic understanding of humans, it's pretty damn obvious right now, when in defeat the Republican Party which was, if nothing else, pretty unified in electoral support for Trump, (much less the broader group of Trump voters which necessarily included a substantial number of non-Republicans) has been turned against itself with great intensity by Trump’s post-election actions, starting with the election challenges and escalating through the Trumpist attack on the Capitol.

> Deny them the right to speak openly and what might you have?

No one is interested in denying the vast majority of the people who supported Trump in the last election the right to speak openly. You are railing against a strawman.