rantanplane
His actions seem very narcistic. He did not care about others at all. He choose the best opportunity to take as much people with him as he possibly ever could.
My knowledge of mental disorders is limited to that required for part of my work but, as far as I'm aware, narcissistic personality disorder does not include the sort of behaviour you describe.
I am, of course, open to correction by a psychiatrist or psychologist
People with NPD swing between seeing themselves as special and fearing they are worthless. Outwardly, they may act as though they have an inflated sense of their own importance but behind that image lies fragile self-esteem that is vulnerable to the slightest criticism or rejection. They may act as if they don't care what people think of them but they actually need people to look up to them to maintain their inflated self-view. Symptoms include exaggerating their own achievements and abilities, thinking they are entitled to be treated better than other people, exploiting other people for personal gain, lacking empathy for other people's weaknesses, looking down on people they feel are 'beneath' them while feeling deeply envious of people they see as being 'above' them.
Someone suffering from NPD may have another mental disorder or disorders which may lead them to behave in such a manner as you describe but, as far as I'm aware, NPD alone would not.
Pace
Some of the postings here are quite sickening!
Only to those who have no knowledge of, nor interest in learning about, mental disorders.
It’s very easy to see somebody as either a perpetrator or a victim. It’s much more difficult to understand that somebody might be both.
why not discuss the mental state of the father and husband of that wife and child he murdered
Probably because this is an aviation forum and people are discussing factors that may have led directly and/or indirectly to this tragedy and, if so, what can be learnt to minimise the risk of a repetition.
Are you suggesting that they don't feel sorry for those who were killed or are unsympathetic to their families?
I have no idea whether the FO's mental health, whatever it was, has any relevance to the tragedy. I'm merely responding to some specific points.