In the wake of yet another foiled ISIS-inspired terrorist plot, this one by a Canada-based Pakistani seeking to kill Jews in New York on the anniversary of last year’s Hamas attack in Israel, everyone is loudly proclaiming: “ISIS is back.”And yet, this analysis is wrong.For someone or something to “be back,” it has to have left in the first place. This return can be surprising or expected, but in the end it is of note. With respect to the ISIS terrorist group, it has not “resurged” because it never went away in the first place.The group has been around since...