In 2017 the Counter Extremism Project was instrumental in getting the video archive of Anwar al-Awlaki taken off YouTube. The incendiary preaching of the American-born jihadist had incited the Fort Hood gunman and the Boston Marathon bombers, among others. Awlaki was killed in a 2011 U.S. drone strike, but his poison had lived on posthumously online. “It’s a watershed moment,” Mr. Wallace said at the time, “on the question of whether we’re going to allow the unchecked proliferation of cyberjihad.” Yet Islamic propaganda and Jew-hatred remain disquietingly unchecked.