I wouldn't be happy OR sad if/when he dies. It'd just be a dead dude who had aggressively pursued his own ruin.
This life-is-precious horseshit is utter nonsense.
You die, a few people, close friends and family members, cry, and life continues on.
To put some actual importance on your existence is fallacy and a source of depression.
One day you're here and the next you are not.
Whatever.