Those are the reports from someone who apparently knew him.
"He was a political radical and met Giffords once before in '07, asked her a question and he told me she was 'stupid and unintelligent.' He was a pot head & into rock like Hendrix, The Doors, Anti-Flag.... As I knew him he was left wing, quite liberal and oddly obsessed with the 2012 prophecy."
From his videos it doesn't look like he had a single coherent thought. Definitely a lunatic.
edit: they also need to figure out where this guy got the gun.