I don't know why he did it and I don't feel right speculating. A lot of people simply snap and this is especially true for people in the military precisely because they DONT have enough mental health services and because of the hardships of war. Very few people close to him seem to think he's an extremist. I am however, that he actually survived. And I suspect that he will later wish he didn't.
"So if you go to Washington, it's buildings clean and nice. Bring a pack of matches...and we'll burn the White House twice!"
"Nobody's talking about extermination. No one ever does. They just do it." - Magneto
"Don't solicit for your sister, that's not nice, unless you get a good percentage of her price."