> it's using the authority of the State to restrict certain liberties in the intent of doing good.
That's called civilisation.
And the US doesn't have absolute free speech. It never did.
Just like other democracies, it has restrictions on speech for various reasons, some good and some bad. It's about where an individual country draws their line on the spectrum:
https://en.wikipedia.org/wiki/United_States_free_speech_exce...
Some US states have obscenity laws that other developed democracies don't. Obscenity laws. Just think about how insane that is as a concept.