It's only a fallacy if you believe bombing the **** out of everyone is the only way to respond.
Except that's not what they're doing. Have you not seen the two step method they use?
The obvious alternative would be a full scale invasion to rout Hamas militants. Care to guess what the body count would be if they did that?
Under the circumstances, Israel is exercising considerable restraint. When we routed Iraq from Kuwait in the Gulf War, THAT was a massacre. I didn't hear the namby-pamby crowd denouncing the U.S. for that much more lopsided war, so why all the hand wringing over this one?