Last year (or the year before - can't totally remember) I began (but never fully got into) the novel, 1984 by George Orwell. While the year is off (written sometime in the 1940s), many of the current day tactics used by the left (or the government as a whole) are predicted in this novel. One of them relevant to this thread is the daily "two minutes of hate" that everyone was required to engage in.
Or, as Wikipedia notes, "The Two Minutes Hate, from George Orwell's novel Nineteen Eighty-Four, is a daily period in which Party members of the society of Oceania must watch a film depicting the Party's enemies (notably Emmanuel Goldstein and his followers) and express their hatred for them for exactly two minutes."
George Orwell wrote:
The horrible thing about the Two Minutes Hate was not that one was obliged to act a part, but that it was impossible to avoid joining in. Within thirty seconds any pretence was always unnecessary. A hideous ecstasy of fear and vindictiveness, a desire to kill, to torture, to smash faces in with a sledge hammer, seemed to flow through the whole group of people like an electric current, turning one even against one's will into a grimacing, screaming lunatic. And yet the rage that one felt was an abstract, undirected emotion which could be switched from one object to another like the flame of a blowlamp.