gonna use something i wrote for a different argument, but on the topic of free speech:
The problem with banning racists, in my mind anyways, isn't the fact that a racist was silenced. The problem is that a racist got silenced for an opinion that directly harms no one else. That further radicalizes the silenced population, and establishes the precedent that silencing opinions, not matter how extreme, is acceptable.
Banning racists doesn't make them go away, and it doesn't even stop them from spreading. It just pushes them underground, and, instead of voicing those opinions and getting publicly torn apart due to the fact that they're just incorrect, their opinions will just fester, and probably continue to radicalize underground. It just doesn't help anyone. And, again, allows the powers at be further power to misuse
If you're experiencing a rise in anti-semitism, racism, unironic use of Nazi symbolism, or extremism of any other brand, that's a failure of the state. Extremism doesn't spread on it's own, it only spreads when people feel they have no other option. Case and point: Wiemar Germany, modern day USA, Syria, Uyghurs in China, etc etc.
It's just not the states job to regulate the public discourse when it doesn't actually harm anyone else.