I think what we're seeing with Ethan is something common to ideologues of any stripe, particularly midwits, people who are new to an ideology, and people who only latch onto trends. Living in a country with a two-party system also reinforces the idea that there are only two diametrically opposing ways of seeing things. A slightly above average person may be able to see beyond this when, for example, they see their anarcho-socialism is slightly different from their friend's anarcho-syndicalism, and their other friend's orthodox Marxism, but anything else is the capitalists and fascists, which are the same thing, no matter how different those two actually are.
No matter what your ideology is and how smart you are, you've probably done this at least once too. If you and most of your friends believe in some ideology generally agreed to be on the right and pay attention to politics more than the average person, you can probably tell the difference between a libertarian minarchist and an anarcho-capitalist, and how both are vastly different from Nazis and Christian conservatives. You also can't be bothered with the nuances of social democrats vs. democratic socialists and probably have even used either "liberal" or "socialist" to describe everything from a moderate welfare-state liberal to an actual communist.
Sometimes it's deliberate. If you have a very particular vision, you lump together the ideologies most likely to oppose it. If your vision is globalist communism, and your enemies will be Nazis, libertarians, and religious conservatives, all for very different reasons, but you label them all as one group and exaggerate the importance of the least attractive of these ideologies (naturally, the Nazis)..
I've never paid much attention to Ethan until relatively recently, so I can't say what was going on in his head, but if I were to guess, he's probably doing what I mentioned above and while trying to recapture some of his former edginess, and ended up doing it in the worst way possible.
