Man, we sure do love conspiracy theories. I'm betting more on that this was just some guy, not part of any "network" or "cell", just another mentally unstable individual that fell through the cracks of our selfish "I got mine, screw the rest of you" culture. Already the first thing people are talking about is what rights will the government deprive them of. Yes individual freedoms are important, but nothing is truly black and white.
And soon it will be the right screaming that the left isn't tough on criminals and can't protect us the way they can, and the left screaming at the right that they're ignorant and savage and cause more harm than good.
Preppers will step up their efforts and stockpile weapons, occupiers will chant some more to a drum circle, and the majority who simply shake their head at both will continue to be ignored in favor of ratings. Divisions will grow, flame wars will commence, and I can't help but wonder what it will take to get everyone to grow up and start thinking clearly.