To which I submit as evidence "Art and China after 1989: Theater of the World", an art exhibition currently on display at the Guggenheim in New York City.
This retrospective of Chinese art had 3(!) works of art removed (ie, censored) from the exhibition because the content was perceived as morally reprehensible by some groups of new york animal rights activists.
Proof that at least along some avenues of discourse (what is allowed in art? when is animal suffering allowed? when is representation of a disturbing act that occurred in the past allowed?) the NYC progressive contingent is more conservative than the Chinese.
Note: This does not mean that China is a paradise of free speech. There are other avenues of discourse (ex political discourse) where this is not the case.
Note 2: They sell hot dogs outside the Guggenheim.
[0]: https://www.theguardian.com/artanddesign/2017/sep/26/guggenh...