I should have said that MAD only works when your opponent believes you will use the weapons, and has enough sanity to not want to be destroyed.

I do not see that this is the case at the present time.

This makes no sense. Iran watched as Iraq, which had no nuclear weapons, was destroyed by the US. And at the same time, it sees that North Korea, which has nuclear weapons, is not destroyed by the US. So if Iran is, indeed, seeking to get for itself some nuclear weapons, it hardly makes any sense to say that it doesn't have the sanity to not want to be destroyed. I'd say that not getting destroyed is exactly what it wants.