This is true. However, the part nobody wants to talk about is that it didn't just happen in Germany.
That's a very generous way of looking at it. In the West, I would say that it would be more accurate to look at it through the lens of the cold war, though. Communism and radicalism were to be prevented and so freedom of speech was necessarily curtailed. In the East, it was likewise curtailed, ostensibly to 'protect the youth' and 'prevent disinformation' but with more potential for immediate consequences.
>Is that ever in the public debate in the USA? Reasonable limits to free speech?
Sure. It's been debated a lot, actually. Laws have changed significantly over the last hundred years, almost entirely to the expansion of free speech side.
Many Western democracies have laws like this, which would be incompatible with the American First Amendment, but which are basically intended to foster democratic health, and aren't particularly authoritarian.
The rules he was talking about though are more to do with the limitations on speech that can be considered insulting, transgressive or hateful. They also include constitutionality of political parties in general, disparaging the president, and many other things.
To the European eye the idea of allowing any and all public utterance feels like a free ticket to disaster.
Deliberate and carefully crafted representation of "reality", and indirect communication via various "trusted channels" is part of winning elections anywhere.
The carefully and orchestrated use of mass media in the 1920s and 1930s, skillfully crafted to lead the electorate to certain political choices, was later used to even accept certain political atrocities (internment camps in the beginning, war and industrial mass murder later).
So to protect the electorate (!) from being grossly misled, many European countries in the aftermath of the 1940s decided to counterbalance the freedom of speech with rules what is not freedom of speech.
And yes, the details are tricky and courts have to decide.
Is that ever in the public debate in the USA? Reasonable limits to free speech?
Here is a fairly straightforward example from the German penal code:
https://www.gesetze-im-internet.de/englisch_stgb/englisch_st...
https://www.gesetze-im-internet.de/stgb/__130.html