Personally I do not see Iran as a threat and even if they are in search of nuclear weapons so what nuclear weapons are one of the most over rated weapons ever invented sure they can kill immense numbers of people but using them pretty much assures your own destruction.
I think much as the Nazi's needed the Jews to focus the ills of a country on the USA needs Iran to take peoples minds off their ills and make them feel relevant.
Outside that I completely agree with your post.
We are more often treacherous through weakness than through calculation. ~Francois De La Rochefoucauld