A couple of ideas.
Any legitimacy, excusability, justification for this one is ludicrous. Targeting a concert widely expected to draw a largely teen and pre-teen crowd is an atrocity, a crime against humanity. This is waging war against children.
If this had happened in Israel, the retribution teams would already be taking scalps. I expect our own clandestine teams are already framing their responses; or at least I sure hope they are.
None of those losers have any expectations of conveying a credible message. They are after something that is actually pretty insidious. They are deliberately aiming to eliminate the worldwide perception of a distinction between peaceful muslims and militant muslims. They are goading the West to ultimate anger at all muslims. They hope the West will lash out indiscriminately against all muslims. This is their intended aim, to convey to even the peaceful muslims that the West is united against all islam, providing a logical basis for all islam to unite against the West.
I think they could succeed. I think so because of the general apathy against terrorism held by so may of the nominally peaceful muslims. If the terrorists succeed in this strategy, it will be at least partly because peaceful islam isn't so peace loving after all.
The Trump speech before the Saudis and the Arab leadership this week is a good argument from a logical standpoint, but watching the neutral stare and glazed eye of the King during the speech tells me volumes. Such an argument might have gained some traction if somebody had advanced the concept sometime in the preceding two Presidential terms, but that could never happen. Instead, the militants had almost a decade in which to hone their approach. That train has left the station.
Greg
It would go along way to defeating the terrorists goal of eliminating the distinction between "peaceful Muslim" and "radical Muslim" if I saw battalions of "peaceful muslims" forming to destroy the "radical muslims".
The radical muslims threaten peaceful muslims as much as they do us infidels.
Time for "peaceful muslims" to nut up and go to war.