Agreed. However, he is still in a position to push a button. In fact, he's in a position to push many buttons that would be catastrophic for all humanity.
Are you basing your analysis on either his sanity or the impossibility of his being able to initiate an insane act?
That, I think, is where we differ.
If Iran gets a nuke, they will use it on Israel within minutes of final testing. And then, Iran will cease to exist.