While painful I do think that’s a more productive mindset to enter the talk (not debate) with.

His reasons for doing so are presumably not all that rational so I’d steer clear off obvious bear traps like rationality.

I liken it more to how you engage with angry toddlers or teens. Acknowledge the issue first. Share their pain and then you can try alternatives.

Not saying I think “talking” will be helpful with guys like Hitler, but I’m not much of an assassin so if I personally where to be put on the spot I have very few other options than try this route of, at least attempted, understanding.