The crew on Brit’s show tonight were quick to cut Charles Krauthammer off tonight when he pointed out the similarity of the killer’s video to the videos that the jihadis always film to be played after they blow themselves up. And his disparaging remarks about Christianity certainly would fit the scenario of jihadi influence.
This, I believe, fits the bill more than any other theory being proposed.
But it's like the Jumpers at the Two Towers on 9-11; way too dangerous to let the public see the awful truth.