Well, now we have the go ahead from pastafarian (thanks), lets go for it.
Man deliberately flies plane into mountain, taking 150 lives with him for his own selfish reasons. Ill make an assumption on his state of mind. Completely ****ed up.
Sorry, I think it IS a selfish act, to kill yourself, and take 150 unrelated, and innocent people, who have placed their lives in your hands with you
...as a single act, of course its a selfish act. You are considering your self, first and foremost.
..
He was a selfish ****.
Whilst I realise that suicide is a selfish act on its own, to disregard the lives of a 150 others during your act, is a level of selfishness I cant even measure.