>Again, the author asks: "...is there a way to prevent any similar outbreak of aggressively performative moralism in the future?" But preventing somebody from expressing their moral values again is censorship.
Censorship isn't the only way to prevent the rise of bad ideas. For example: "the solution to bad speech is more speech"
When Twitter's algorithm promotes certain topics and demotes others, that is a unilateral act made by a single, unaccountable entity that has full control over the platform. That is (or at least can be) censorship.
Yes, but when enough people who otherwise have little actual power get together to drown out "bad speech" with "more speech" it gets called 'cancel culture' and 'witch hunts' and is used as the primary example of 'censorship' on social media.