Faul,
We're not sure that anyone is talking seriously about invading Iran but more so just an airpower event. And, the only reason that the world and the United States is seriously talking about Iran at all is the fact that they are trying to develop a bomb.
Also, there is a theory of history out there that states that because the United States used the bomb and it was not just an untested theory that we might all be better off for it. Our personal involvement in the use of the bomb came from a clinet that we once knew who is now long dead who cried when he told us about his being selected to be among the initial wave of troops to invade Japan. He crie3d in appreciation of the fact that he knew that he would probably have been killed in that attack. No one knows how many American lives might have been lost if we would have had to invaded Japan.
As far as the rest of your post goes. All great powers do things that many may not find to be legitimate or particularly caring. There are always different perspectives and we should always pay attention to those. The very best example of that is what happened during the Cuban missile crisis in October of 1962 when the Kennedy administration and its young president paid attention to correspondence recieved from the Soviet leadership. They got one powsitive letter and one less positive letter. They chose to reply to the more positive letter and the rest is history.
Some states due to their make up rise to the top of the heap for a time in history's parade. Others are merely relegated to secondary roles and are, in essence, the pawns of history. It is simply the way of things.
IOVHO,
Regards,
Joe