Israel has submaries that carry nuclear weapons
Not "has", but "is in the process of acquiring". I suspect that has much to do with the nuclear weapons that Iran does not want and is not building X-/
Besides, the easiest way to nuke Israel looks like this: a rusty freighter under the Panamian flag arrives into Tel Aviv. One minute after it docks, Tel Aviv is a radioactive crater. That's all the information you have -- what next, do you order a nuclear launch on Tehran? On which basis?
And, of course, a few nukes will not make a large country like Iran "cease to exist". Look at Japan.
Yes,and think what happens to economic investment in Tel Aviv if people in a nuclear-armed Iran hint that they might do this.
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