Whereas it is a terrible thing to witness the mass destruction of so many human beings at the hands of those who choose such actions to demonstrate their discontent with the Western powers whom THEY blame for the destruction of their various nations, it might be worth noting that, those who paid the ultimate price for the misconduct of those Western powers, were at least in an environment where they were enjoying themselves when they met their end.
Quite a different kettle of fish to being blown to Kingdom Come whilst innocently going about one's daily chores, or [as in the case of Jihadi John] merely walking to his car when he was struck by a missile fired from thousands of miles away at the behest of the West.
Thank God the IS do not have such technological weaponry at their disposal, if they HAD, the shit would truly hit the fan and we would ALL be cowering in our shelters afraid to put our heads above the ground.....you know..... just like the innocents of many nations who are subjected to the "Fire Power" of the mighty Western forces.
Save your tears people, many of the victims of THIS outrage, died happy. more than can be said for those who live in fear on a daily basis and count themselves fortunate if they even have a roof over their heads when the mighty West opens up on them.