We threatened to do the same to Kiev and Minsk.
Had the USSR launched a nuke strike against us, the average joseph on the street wouldn't have had a thing to do with it. That wouldn't have stopped us from doing what needed to be done. As a result, cooler heads prevailed in the Kremlin. Maybe we should put a similar fear into the moderate Muslims to hunt down and take care of their extremist problem. If NYC or DC is nuked, Mecca and Medina are fair targets.