The Iranians were offered Russian fuel under strict control and declined.
... so, in short, no credible evidence Iran is building a nuclear weapon then, but plenty of guilt by association you would say.
I do not believe the Israelis want a nuclear war.
Me neither. But they have made loud and repeated demands for blowing up nuclear facilities of other countries, what better recipe for nuclear fall-out do you want? In that light, the Stuxnet PLC virus is not all that surprising, but probably less well-understood in terms of its capacity for bringing about similar nuclear fall-out results.
E.g., can you imagine explaining to a Saudi crown prince, or some such, how a PLC worm program might dump radioactive particles on Mecca, if the winds are blowing the right way?