tl;df. I guess the point was that he couldn't assimilate into civilian life and the military didn't help him after an otherwise glorious end to a career he can't talk about. There you go now you don't have to read the wall of text.
This story seemed overly dramatic about the fallen hero angle. I don't doubt civilian life is difficult to adapt to. I've seen it first hand. But, it seems more like society is more in love with seeing their military heros fall from grace rather than succeed, and that's probably what we really need to fix. It still feels like we're haunted by the ugly perceptions we developed about our vets during Vietnam.
Does it count as assassination when it's part of a military operation? If so, then yes you're supposed to feel sympathy for people in the military that have trouble returning to normal life.