The Honey Badgers had a great video on this. Basically, SJW types are religious, and use religious thought. That is to say, they have their conclusion already -- you're sinful, they're pious, this person is the devil, etc -- and work backwards from there to justify the conclusion.
That's why logic, reason, et cetera doesn't work on SJWs, Post-Modernists, or other radical leftists (and radical righties, too). Because they literally aren't working with that sort of thing. They have their conclusion -- Vic evil, GRR -- and are working backwards from there to find something, ANYTHING to justify what the hell they already know to be true. Whether or not it's actually true is irrelevant.
If you do break the chain -- prove them wrong, that doesn't matter. The conclusion won't change. They'll just retreat backwards a little bit to find a different faux reasoning.