A man walks into a movie theater with a rifle, a shotgun, and a handgun, plus two canisters of gas. He sets off his smoke bombs and then opens fire, randomly, at the packed crowd. He kills twelve people outright and wounds at least 38 others, some of them seriously enough that their survival is in doubt. He is captured almost immediately. He is a white male American, 24 years old. Another day, another massacre in America. By now, our national consciousness is almost inured to such violence. Ho hum. Move along. Nothing to see here. For a day or two or three, all the politicians and public officials will offer sober words about the killings. They will talk about how their prayers are with the victims and their families. They will talk about how the perpetrator must be prosecuted to the full extent of the law. And then they'll go back to business as usual. The victims, their families, and their pain will be pushed to the background and forgotten. Soon enough, there will be another s...