That is what I think, they are trying to come up with kookie theories.
I think the colonel who knew the shooter at Walter Reed added a lot of perspective. Painted the picture of a guy who wouldn’t shut up with about his dislike for our military position. Kept spouting politics. Was told to can it. Sounds like they eventually transfered him from his 6 figure job to an active unit ready for deployment. And he didn’t like it.