G.K. Cheston make an observation about literature that I think applies to politics as well. He said that all over the world the old, popular literature is the same. It consists of very dignified sorrow and very undignified fun. Its sad tales are of broken hearts, and its happy tales are of broken heads.
In the case of the crazy lefties, it is a mixture of the two kinds of tales. The lefty has a broken head and is always laughable. But because he has a broken head and can't think straight, he causes much damage to those around him. That damage he causes is where the sorrow comes in.
I don’t understand your (maybe Chesterton’s) point. My lack of glee isn’t because a small fraction of the population is nuts and/or irrational, it’s because a substantial fraction (maybe a majority) advocates more government by self-anointed superiors than is healthy for a society of free people.