He and his mother claimed he had PTSD, and Kyle had set up an organization to help veterans with PTSD.
“Kyle paired with FITCO Cares Foundation, a nonprofit organization which created the Heroes Project to provide free in-home fitness equipment, individualized programs, personal training, and life-coaching to in-need veterans with disabilities, Gold Star families, or those suffering from posttraumatic stress disorder.”
And, oddly enough, while the VA seems to think that veterans with PTSD should be disarmed, they are not generally considered a threat to others with guns. If anything, they might be suicidal. But if they are not suicidal, firing guns at a range might be therapeutic.
Not so with paranoid schizophrenics, however.
I have a feeling nobody bothered to clue Kyle and his friend in on the Schizoid paranoia or the fact that the guy was threatening to kill people.
Its true that people with PTSD are not usually violent and a threat only to themselves. I doubt the guy had PTSD at all as the article is postulating.