Narrative is a tool of fiction. This is a another attempt to spin a yarn for the general public that does not define this for what is was. An enemy attack against a civilian target.
DAESH/ISIL/ISIS gains its effectiveness by a willingness to issue broad guidance to potential jihadis... Something to the effect of “go kill a lot of infidels, if you die, you go to paradise” They don’t direct detailed specifics, nor do they need to in order to get strategic effects.
Just like Zero doesn’t need to give in person, specific marching orders to Lynch or Lois Lerner. The reason they got the job was because they KNOW what to do without being told. Well, libtards, have a nice 8 years. Sauce, goose, gander and all!