osamas death ripple effect

maybe Mr obamas intentions by authorising osamas killing were genuine but i believe he was ill informed on the ripple effects.according to a statement by Al qaeda's most senior figures Khalid Sheikh Mohammed a nuclear bomb is supposed to detonate in Europe now that he is dead!did obama have some some thought to the people of Europe when he was authorizing that operation?Americans in America did celebrate but did their counterparts in Europe do so? i believe they were busy bracing themselves for the looming retaliatory nuke.this explains why Mr George bush and Mr Clinton didn't attempt to kill Osama