It depends. Do we really want to repeat the timeline of Germany and Europe where Europe spent nearly six years with numerous pacts to where Germany was strong enough to take them all on?
http://www.worldwar-2.net/prelude-to-war/prelude-to-war-index.htm
Europe is doing now what they did then. Sit on their hands, argue, make pacts and act like nothing is happening. Europe didn't work together then and they don't now. Netanyahu is not speaking for the US, he is speaking to the US congress. He knows that 50 states would come together much easier under one president than all of Europe would.
Hypothetocally do you really think if Iran blew up Israel then there would be Peace? Or do you think Iran and its axis would attempt to take over Europe?