Propaganda is part of the standard for any group trying to control the narrative in a democracy. I would suggest Chomsky and Herman's book "Manufacturing Consent" for more details.
The American far left creates and disseminates far less propaganda than the far right does, although I’m open to hear evidence otherwise. For whatever odd reason it seems that the left in general is far less amiable to inflammatory propaganda - for example, there’s much more evidence that Donald trump coordinated his campaign with foreign intelligence services than there is evidence that Obama is a socialist Muslim or that Hillary Clinton was complicit in child sex trafficking or satanic rituals.
In my estimation I’d say that the main tools of the far left are currently censorship and ostracism within communities, although the far right engages in these practices just as avidly.
