Obama spoke with absolute certainty when he claimed that IS is not Islamic. In his speech on September 11 announcing that the US would commence limited operations against Islamic State, US President Barack Obama insisted, “ISIL, [i.e. Islamic State] is not Islamic. No religion condones the killing of innocents, and the vast majority of ISIL’s victims have been Muslim.” To be sure, it is hard to see how any human faith can countenance IS’s actions. For the past several months, on a daily basis, new videos appear of IS fighters proudly, openly and wantonly committing crimes against humanity. This week...