Quoth the bread book:
Coming together with diametrically opposed views, they are forced to form arbitrary alliances in order to create majorities that can but last a day. Wrangling, calling each other reactionaries, authoritarians, and rascals, incapable of coming to an understanding on any serious measure, dragged into discussions about trifles, producing nothing better than bombastic proclamations, yet taking themselves seriously, unwitting that the real strength of the movement is in the streets.
All this may please those who like the theatre, but it is not revolution.
Fast forward 120+ years and we've got a proud (only somewhat sarcastically) tradition of fucking up on that score. Mocking Trump and generating tones of internal noise is way easier than actually getting shit done.
Mind you, a lot of the time we don't actually know how to get shit done even when we try.