I believe they made the same promise to Saddam as well.
Europe couldn't invade a company picnic if they wanted to, let alone take care of Iran.
Since Kerry isn't President (Thank God) we are not bound by any "Chamberlain pacts" they might sign. All they need is to start stating their aim is "Peace in our time" and the picture will be complete.
What are we waiting for? These mullahs are toying with us and buying valuable time. Can we move a little faster? (paraphrasing Ledeen)