Back in the 1930s the question was "What will we do about the Nazis in Germany?" and the problem grew until it became a war that consumed millions of people.
Today we are faced with the question, "What will we do about Iranian Islamofacsists with nuclear weapons?"
So, what to do about them?
Pre-empt or wait for them to strike first?
If Telaviv is reduced to rubble, what then?