There are bountiful examples of regulated speech in the modern world and yet the world isn't only China and Russia.

Speech is regulated right here on this platform, where you clearly have no qualms with participating. Speech is regulated in Germany, where it is outright illegal to express Nazi-sympathizing opinions or to deny the Holocaust. Speech is regulated in the US, where you cannot shout "fire" in a crowded theater or promote investments you haven't disclosed your stake in.

Not all slopes are slippery.

> or to deny the Holocaust

Purely out of curiosity, what do you think about government mandated beliefs?

The government doesn't mandate beliefs. In this case, the government denies you a platform to spread particular beliefs. It's hard to argue that leaving holocaust denial out of the discourse is losing much of value.

> In this case, the government denies you a platform to spread particular beliefs.

Is this something you believe to be a good thing?

It's something I believe isn't a slippery slope. We have ample evidence that denying a platform to limited sets of beliefs (e.g., Holocaust denial or Nazi sympathizing) does not quickly devolve to total censorship the likes of which we see in China and Russia, which was the original argument you made.

If you're backing down from that original assertion I'm happy to argue other aspects of this discussion, but I'm not going to chase you around in a circle while you keep re-framing the argument.