The Drums of War
The narcissist thrives on conflict; the narcissist needs a war.
With fighting comes emotional dysregulation, and with emotional dysregulation comes tunnel vision, impulsivity, blindness.
Once an individual has shown themselves to be narcissistic, insulting, thoughtless, you must defend yourself against them. If they can enrage you, they can beat you; prevention is better than cure. You live in a high trust society, which is to say a naive one. You are surrounded by human cattle; the bravest were killed off in two world wars.
The narcissist attempts to syphon your energy by feeding you a little bit of rage, in order to get a lot back. Rather than giving them what they want, use the anger they inspire in you to get things done.
En garde.