There's a lot - it's the default organization structure for humans.
Friend groups are more often than not anarchist. Valve (the makers of steam) is designed as an anarchist company where workers freely start and join projects (they're not the only ones with a similar structure, but their employee handbook is an interesting read). The fediverse is generally anarchist
There's very few pure ideological systems out there - certainly there's never been a pure capitalist or pure dictatorship. There have been pure anarchist communities out there, because it's not rule by consent or through will of the people, all it takes is people coexisting with an aversion to hierarchy
The paradox of tolerance is such a ridiculous notion to me. It's like someone responded to a bad faith argument and the idea caught fire.
There's no paradox. Tolerance doesn't mean you tolerate people punching you (or a bystander) in the face, it means you tolerate who they are - not what they do.
I'm a Jew, and if I run into an old school, final solution Nazi I'm going to think "wow, what a stupid piece of shit excuse for a human being". As a person, I'm going to judge them for being dumb and having terrible moral character, but I'm going to tolerate them.
Now, if I catch them holding a rally, painting swastikas, or just overhear them advocating for the theoretical extermination of my bloodlines, I'm going to react accordingly. That's not about who they are, that's about what they're doing - they can believe whatever they want in their heart of hearts, but the moment they try to spread that shit it's an act of violence, and it demands an appropriate response.
If they spread their nonsense in some private corner of the Internet, you fight back with words. You don't virtually chase them into an echo chamber beyond your reach or into isolation - just because you're on the right side doesn't make your actions right.
By attacking them for who they are (an idiot susceptible to dangerous ideology), you feed their delusions and cut off opportunities for a better take to be hammered into them.
Deplatforming them is a serious thing. When it's just words, correct them, maybe mock them. Deplatforming is what you do only when they organize - you break that shit up, because it transitions from a shitty take to a group that is making increasingly credible threats. And when they start to actually act, you do what you have to do so they fear showing their colors.
You have to police actions - never identity. First you remove the ability to do harm, then you pull them back from the fringes and let them rejoin society (so long as they can abide social norms).
And in doing that, there's no conflict. The paradox only appears when you start to overreach, and at that end lies a different flavor of fascism - theirs is prejudice, on ours is ideological. Regardless, it's still fascism - fascism is all about going after whoever "doesn't belong", regardless of criteria
Tolerance means everyone belongs, it's a nice clear line that has no contradictions - everyone belongs, but you still police actions (including words) appropriately