They had a group of psychologists on the radio yesterday saying that his age was ripe for onset of serious mental illness and that his actions mirrored those of someone acting out their mental problems.
Inexperienced doctor learning the hard way about paranoid schizophrenia?
-— his age was ripe for onset of serious mental illness -—
Schizophrenia starts around 18-28, IIRC.
Depression would explain suicide.
Schizophrenia would explain crashing a plane full of people, as would Islam.