Israel is really the only nation that wants a war with Iran, although Israel doesn't really want to be a party to that war. It is a very similar scenario to the Iraq war in which Israel get their wish with an American attack on Iraq. Although it cost a trillion dollars and killed a hundred thousand people, it accomplished Israel's goals. That is pretty good for not even being a party to the war. Israel is looking for a repeat in Iran. They have Obama who has done everything but convert to Judaism in order to make Israel happy, but Obama may realize that his new friends want his scalp only second to the Iranian scalps.
U.S. to defend Syrian rebels with airpower, including from Assad (Reuters)