From The New Yorker, Seymour Hersh, Would President Bush go to war to stop Tehran from getting the bomb?:
Other European officials expressed similar skepticism about the value of an American bombing campaign. “The Iranian economy is in bad shape, and Ahmadinejad is in bad shape politically,” the European intelligence official told me. “He will benefit politically from American bombing. You can do it, but the results will be worse.” An American attack, he said, would alienate ordinary Iranians, including those who might be sympathetic to the U.S. “Iran is no longer living in the Stone Age, and the young people there have access to U.S. movies and books, and they love it,” he said. “If there was a charm offensive with Iran, the mullahs would be in trouble in the long run.”
Another European official told me that he was aware that many in Washington wanted action. “It’s always the same guys,” he said, with a resigned shrug. “There is a belief that diplomacy is doomed to fail. The timetable is short.”
Here.