There is evil among us. Always has been, always will be. As I write this, in the past four days, a high school assistant principal in Omaha was shot and killed and the principal wounded. Democratic Rep. Gabrielle Giffords of Arizona and 19 other Americans were gunned down at a constituent meeting being held at grocery store in Tucson. Federal Judge John M. Roll, a 9-year-old girl and several others are dead. A dozen more, including Mrs. Giffords, are gravely wounded. In addition to this slaughter and the gunning down of the high school principals in Omaha, scores of other...