I thnkk that was certainly part of his motivation. Fits the messianic will-to-power mindset. You know, there's something positively Manson-esque about this guy's entire worldview - one that he proceeded to demonstrate, cooly and calmly.
What concerns me is that some of these people are smart enought to attempt to drape the American Right in the same clkothing, fueling the fire that's already burning hot on the Left. The formula: commit atrocity and claim brotherhood with those whom you wish to draw into the conflict.
A tried and true tactic.