I'm referring to a sentiment I see all over lemmy quite often. I don't think you get to dismiss all those cases are politely pointing it out. Plenty of other users here notice it too, and point out how counter productive it is. I mean even just the term "liberal" is seen as a proxy for evil here. My guess is that plenty of "liberal" people don't even conform to the views they are presumed to hold, and plenty of "liberals" are very much on board with most of the same leftist ideas as the ones claiming ideological purity over the liberals. The biggest difference is that some of the purists may know more history than some of the people they hate and claim are the problem.