Let's look at what the Iranian government would gain if it tried to nuke Israel....






...nothing. It would gain nothing. It would be destroyed and it would accomplish nothing else. There are many things Iran would probably like to do... becoming a major power in the Middle East is probably one of them. But destroying themselves for nothing doesn't accomplish anything they want.

They also feel quite confident that the regime in Israel will be dismantled without any help from them, so they don't really see any need to do anything to remove the regime themselves (thereby destroying themselves in the process).

Hitler only said he was going to kill those he actually intended to kill. Since the Iranians say death to things they clearly have no intention of killing (anything that pisses them off), it is pretty obvious that their use of that term is not similar in any way to Hitler's statement of his intentions.