I'm not sure what point you're trying to convey though?
We can't just say, "The boundaries of hate speech are unclear, so we'll do nothing and have uncensored speech." This experiment has been tried over and over again, with uniformly bad results.
The problem is that having uncensored speech doesn't scale, because eventually you'll become big enough to attract media scrutiny, which inevitably cherry-picks the worst parts of the user base. This cause 1) advertisers to pull out and 2) starts attracting more of the wrong type of users.
But actually I do believe in the concept of unrestricted speech.
But I really don't know when was the last time, that was tried. There were times, when certain topics were ok to speak freely about, like racism, yes, but at those times other topics were restricted, so what exactly are you talking about?
The US has the freest speech that I know of (granted it’s also the only model that I’m so familiar with), and even it has plenty of restrictions:
https://en.wikipedia.org/wiki/United_States_free_speech_exce...
And no, shouting “fire!” in a crowded theater is not illegal and is protected by the First Amendment.
https://www.theatlantic.com/national/archive/2012/11/its-tim...
Including illegal things?
In Saudia Arabia it is illegal to say, God does not exist. (and in germany under special circumstances, too - meaning, if enough people would get angry at you saying that, it would be illegal for you to say so)
Do you have a crystal clear definition then, on where is exactly the difference?
I doubt there exists one.