This is a brief synopsis of the minds of Leftists everywhere, describing the things that hold Leftists in common. It's a good starting point. I would add two items. First, Leftists are angry people. They tend to be inherently angry and they focus their anger on people who are contented. Second, they are totalist in outlook.
They operate within distinctive parameters of a “theology of Armageddon — a final battle between good and evil” – in which the stakes are nothing less than universal salvation. As outlined in Eric Hoffer’s classic, The True Believer, such movements have mastered the art of “religiofication,” that is, converting political grievances into messianic aspirations and “practical purposes into holy causes.”Read the whole thing.