For a moment, put aside the debate over gun laws that started before the dead had been properly counted in Newtown, Connecticut, and help me understand why there are so many crazy people walking around. I’m not talking about odd people, or angry people with bad tempers. I’m talking psychotic-you-can-see-it-in-their-eyes-from-fifty-feet-away crazy. Jared Loughner. James Egan Holmes. Seung-Hui Cho. These guys didn’t exactly hide their craziness from the world.