Wiki - The paradox of tolerance states that if a society is tolerant without limit, its ability to be tolerant is eventually ceased or destroyed by the intolerant. Karl Popper described it as the seemingly self-contradictory idea that in order to maintain a tolerant society, the society must retain the right to be intolerant of intolerance.
If it is blatantly obvious that the person is lying then they are willfully ignorant, and if they refuse to acknowledge that they were wrong then they are intolerant.
If they were lied to with no reason to believe the person was lying and immediately stop supporting them once they find out, then they were not being intolerant. Hard to fault someone who acted based on the knowledge they had at the time.
Anyone who did not see through Trump’s lies were willfully ignorant because reality constantly contradicted him. But most people knew he was lying because he constantly contradicted himself and they agreed with his intolerant views and knew he was lying about anything he said that sounded tolerant.
So 30%+ of America is intolerant by your measure? Seems awfully high. That’s the paradox of tolerance. The more you tolerate intolerance, the more it spreads. It’s insidious.
Personally, I think your measure of what is tolerant and intolerant is not quite right. It’s beliefs and actions that matter. You seem to tolerate beliefs, even if intolerant, so long as the actions are within a framework you don’t think is acting intolerant. That framework will get pushed to the limit, then stretched, then breached. So, despite a different definition, the paradox applies. Allowing the intolerant to amplify and spread their views should not be tolerated. They won’t follow the rules in the marketplace of ideas. They don’t argue in earnest. They spread hatred and it grows. Tolerating the intolerance, not correcting it and calling it out allows it to grow. That is why intolerance should not be tolerated.
30% seems about right, yeah. IIRC that’s also the highest electoral margins the Nazis got in free elections.