Every day, I am more convinced of Ann Coulter's solution:
"We should invade their countries, kill their leaders and convert them to Christianity. We weren't punctilious about locating and punishing only Hitler and his top officers. We carpet-bombed German cities; we killed civilians. That's war. And this is war."
I think we should establish a "Mutually Assured Destruction Doctrine" that says if the USA is hit by WMD, we will hit all of the major Islamic states with WMD and do it with extreme prejudice.
Unlike the Cold War where our enemy was capable of destroying our capability, these guys are not. We would not have to react simultaneously.. but we would have to act with impunity and upon conclusive evidence.