With all the pressures of life and the sheer complexity of our brains, I am almost surprised more people don’t go postal.
I tend to see individuals like this as people with a screw loose, or in scientific terms “nutcases”. This would include Timothy McVay and the Unibomber guy, probably throw in Manson for good measure and the nightstalker while I am thinking about it.
I am 100% convinced that this individual is a raving loony with a broken brain. It has happened before and will happen again. Probably more as things get more stressful in our world.