It's a similar deal to the Cuban missile crisis... see article...
Consider that if Iran was flying in ballistic missile systems into territories to our immediate north and threatening to push us into the sea after arming up ISIS type groups against us (which are there) ... we would be doing the same thing... preemptive strikes in the face of a policy of our annihilation if we did not act timeously. It does not forgive what is going on in Palestine, but unless all the Islamic states decide that they can co-exist with Israel and stop having a policy of wiping them off the face of the earth... there can be no resolution to Palestine due to ongoing violence.. And that is the trouble with Islam... all the mad mullahs and their personal vendettas and fatwas.