> But if you focus on the behaviour, you can try to negotiate: "You are a genius, your work on ___ is brilliant. However, this behaviour ____ is unacceptable, please stop doing it. Here is why..., Here is something more constructive you could consider..."

Incredibly well said - that's the point I was reaching towards and couldn't quite articulate perfectly, apparently. Ideally, we'd call out shitty behavior and change that behavior. I didn't mean to suggest a "my way or the highway" attitude; rather, my point is that we shouldn't keep quiet when someone's being a jerk.