The world is beset by terrorists — witness the American hostages taken in Algeria this week — but portions of our federal government continue to obsess about alleged home-grown threats from the “far right.â€The Combating Terrorism Center, which is based at the U.S. Military Academy at West Point, has issued a new report on its website entitled“Challengers from the Sidelines: Understanding America’s Violent Far-Right.â€Normally, the center’s activities are focused on al-Qaeda and other violent Islamic groups seeking to topple governments around the world. But the latest report looks inside America itself, and if the center is to be judged...