I was then surprised to read today that:
It’s a common misperception: Mass killers are mentally ill. In fact, fewer than 1 in 6 has been diagnosed as psychotic, according to a 2015 paper. Past violent behavior, a history of animal cruelty, childhood maltreatment, access to guns, or being young and male are more reliable indicators. So when President Trump portrayed last Sunday’s church shooting in Sutherland Springs, Texas, as a mental health problem – the killer had escaped from a mental health facility in 2012 – he was really pointing to an exception rather than the rule. [...]
[...] Of 88 mass shooters – those who had killed four or more people in the US – since 1966, only 14.8 percent were diagnosed as psychotic, according to 2015 paper by Northeastern University criminologist James Alan Fox, a gun violence expert who maintains a database of indiscriminate mass shootings.As the article goes, it doesn't make much of a strong case, since its main point looks to be that not all mentally ill should be viewed as a source of doom.
Yet, I wonder, are we all settling for too comfortable an answer? The Sutherland Springs shooter is an easy case of mental disorder, but it is hard to forget the Las Vegas one, whose perpetrator looked to be smarter than everyone in this blog - if we judge so only by financial achievements.