Well we can either change foreign policy and start a long road to trying to repair the damage done, bomb more, start another ineffective war, or somehow get the blessing of Russia and bring the full weight of the (actually fully committed and mobilized) western world down on Isis and everyone else who fucks with us.

Now obviously option 1 is probably the best approach, option 2 is the most likely, and option 4 is the one that is appealing in the wake of hundreds of innocent people dying.