The US cracked down on Gaza protests quite harshly. Many states enact book bans these days and some ban topics like slavery from schools. Also historically protests against Vietnam were partly gunned down. The black panthers were often murdered and in fighting them the US even bombed one of its own towns. Red Scare was huge and Ernest Hemmingway was probably driven to his suicide by FBI surveillance, for which he was called paranoid but later proofed real by declassified files.

Censorship in China goes farther, but the US is far from being a free speech haven or ever having been that.