> "appears to behave normally in regular matters and is capable of independent living, does not match other DSM symptoms, but believes insane things"
I have met a lot of people in my life who fit this criteria. Not one of them has gone on to become a mass shooter.
Saying we need a phrase to label people like this in order to _stop mass killings_ sounds crazy to me.
If you really had the option to explore the psyche of everyone to the depth necessary to check for "believes insane things" if we could even agree on what that means, I wouldn't be surprised if the test came back positive on 40-70% of the population. A strict enough test and I think we could get that number to 100%.
Isn't it a meme at this point how people win the nobel prize in one field, and then say some nutty nonsense about a completely different field? The human species is rational, insane, brilliant, stupid, compassionate and vicious, ugly and beautiful all at once. All of us.
More compassion for self and others would be my preference.