These are people who are entrenched in a theory that also suggests people who disagree with you are "the enemy". Arguing with someone like that is risky becaus

These are people who are entrenched in a theory that also suggests people who disagree with you are "the enemy". Arguing with someone like that is risky because the moment you get through to them, their cognitive dissonance might decide to double down on the falsehood because they would have to come to terms with the notion that they believe something quite shameful. I see this happen in other areas alot. Mostly white people who can't handle that they may have contributed to racism at one point. "I'm not a racist! You're all just social just warriors!" turns into "I'm not a racist but...[insert racism here]". Of course the deep insecurity over being actually racist is the common thread. Meanwhile there's a whole other movement of white people who are now willing to admit how privileged all of us are to have been in a system for hundreds of years that was a "democracy" for some, but a nightmarish dictatorship for black people. Was I insecure when I realized how tone deaf I had been? Sure. But I possess self reflection and have made efforts to change my behavior since then. But yes, if I find myself in a conversation with a holocaust denier I'll do my best to convince them they're wrong. I highly doubt that winds up working though.