Cancel Culture is a logical extension of Communist methodology where the Communists do not have power yet but are getting close. In this case they do not yet have political power but they pretty much own the culture.
Cancel culture is just part of Communist practice. We have the establishment of the party line (PC), the accusation of people who stray from it (media or social media attacks), where like any “struggle session,” they are suppose to acknowledge guilt, and then their conversion into non-persons to (cancellation).
This was a constant in Communist countries, and was going on in leftist groups in the US in the 60s and 70s. It’s simply now that they have achieved such critical mass, mostly through their dominance of academia and the media, that it’s been extended to the entire country and every single person living in it.
Also, don’t forget the leftist slogan during the 70s: “the personal is the political.” This meant that no sphere of your life was exempt from politics. I remember one example in CA when I was living there where a bunch of radical feminists turned on another feminist because she appeared to be happily married to a man and worse still, had a son whom she refused to reject.