This is them trying to say they aren't a left anti-communist. Followed by this for good measure:
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I already posted another dunk from this same thread, but this person is a goldmine of pretentious and unintentionally hilarious takes 
Link:
https://hexbear.net/comment/3942471
See, you're causing leftist infighting by demanding the leftists actually be on the left. If you were a real leftist you would allow right-wingers into your leftist group, like a smart person.