It's no secret that many U.S. environmental groups have become more strident and ideological during the Obama residency. But you may be surprised just how extreme they have become. In early October, a national network of environmental groups - called Stop the Frack Attack (STFA) - held a summit in Colorado to discuss their campaign strategies. The STFA alliance is led by Earthworks and includes other well-known national activist groups, such as the Sierra Club, Natural Resources Defense Council and Food & Water Watch. Dozens of smaller groups, which routinely serve as the face of national groups in state- and...