True, but another commonly cited exception is that it’s illegal to yell fire in a crowded theater where there is no fire. My assumption is the rationale being, if your speech is likely to present a danger to people it shouldn’t be legal.
But you’re correct, America is pretty tolerant of hate speech, and it does lead to some pretty negative consequences imo.
Probably a better comparison would be countries like Canada or Germany.
EDIT:
I do applaud you for taking the time to research it rather than getting caught up in the sensationalism of a Twitter post like so many others replying to me.