I don’t buy it. Anything that gets your juices going is bound to show up on scans. An aggressive act of revenge is bound to get you agitated, emotional and excited, but once you’ve done it are you going to endlessly look for more opportunities to attack people you think have wronged you? Or is it more of a one-time thing? And revenge served cold? Does that even show up on the scans?
I know people that walk through life always looking for a fight. I bet you do as well.
There are people that find inocent remarks as a personal attack and are immediately outraged.
I think that some people (Democrats generally) that are addicted to being angry and in some it frequently leads to violence.