Why would a “pensioner, 66,” suddenly go on a stabbing spree and try to murder four women? Maybe Ethem Aydin Orhon is mentally ill; we will certainly be told that he is, whether he is or not. But there is also the possibility — one which neither authorities nor the mainstream media are likely to pursue — that this Turkish Muslim had a different motivation, say, something like this: “If you are not able to find an IED or a bullet, then single out the disbelieving American, Frenchman, or any of their allies. Smash his head with a rock, or...