Killing one is good. The coalition led by Obama thus far has killed 8,000. Are you able to figure it out that dead DAIISH can't take more hostages and kill them? Since you think the bombing hasn't done any good you must believe DAIISH terrorist still roam the earth and kill when they thenselves are dead. Do you believe in zombies or something?
The alive ones are losing territory and equipment and sources of revenue because of the bombing. They are about to be driven out of Mosul. That will be a huge turning point in the war in Iraq.
The bombing enabled the Peshmerga to establish a beachhead on the western side of Mosul. If you know your geography that is the side between Mosul and Syria. DAIISH are having their supply route into Mosul
If not cut off - highly disrupted.
Dubya got 4484 Americans killed in the needless war that got this whole mess started. No thanks on Dubya in charge of anything more than cutting brush on the ranch and painting pictures of himself in the bathtub. Clue for you Dubya. Your dirt will never wash off.