[Natsu]

The irony here is that the 'intolerance' Popper was worried about was people using 'fists or pistols' and the whole thing was premised on the right of self-defense. Times have changed and that Overton window has shifted quite a bit, to the point where people use Popper to prop up the idea that they have a right to use their fists to silence people they hate based on a theory of future harm if those people were permitted to speak.

Having completely lost the idea that the right of self-defense is the right to use reasonable force to protect oneself from immanent violence and it doesn't apply when you start the fight. [1]

[1] https://lawcomic.net/guide/?p=864 gives a nice, simple overview of how it works.