For me it's the difference between someone who has a different opinion on the same facts, as wrong as I may find that opinion (and they mine) -- and a movement that just destroys and creates facts ad-hoc, believes what it wants, and smears and attacks anyone not aligned. It's the difference between someone who disagrees with or even fights me -- and someone who attacks me while they're basically wrestling with the voices in their head, without seeing or hearing me, at all.