Why do radical left wingers (SocJus, Neo commies etc) tend to use guilt by association, false equivalence and generalization fallacies?

ADFSDF1996
For example, it’s very common for radical left wingers to call a person a “Nazi” for any little thing that usually has nothing to do with nazism. If a person likes listening to the German military march called “Erika”, a bunch of Radical left wingers (SocJus and Neo commies) will get offended by the march. The march has nothing to do with politics, it’s just a song about a flower and a woman named Erika. So there really is no reason why anyone should be offended by such songs.
This kind of reasoning is guilt by association, false equivalence and generalization fallacies all in one. I think these radical left wingers judge books by their covers, they don’t care about getting to know all the details. They assume the book cover is all there is to know and that’s why they resort to nitpicking and distorting facts about a subject to suit their narratives.
How dare you listen to “Erika”!
How dare you listen to “Erika”!
Some ignoramus recently commented stupid remarks on one of my posts where he pretty much called me a “nazi” just because I like to listen to traditional German military songs that are apolitical. It’s obvious he didn’t read the post and he is also oblivious to the fact that I’m actually mixed (half East Asian/half Hispanic). So him calling me a “Nazi” is pretty stupid on his part.

So in your opinion, why do do these people like using such fallacious arguments?
Why do radical left wingers (SocJus, Neo commies etc) tend to use guilt by association, false equivalence and generalization fallacies?
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