I don't see it starting a war, I see this leading to a cluster****. I imagine Syria will play out like Egypt: The evil regime will be replaced by a radical element of Islam, the people will then be worse off and a few years from now the people will have to rise up with foreign military help to be as free as they were in 2010.
Makes one wonder. What if the US had bit the bullet and helped the people of Iran overthrow Thier gov't, when the people rallied a few years back. Would that in turn made the Mideast safer knowing that Iran runs and trains a lot of the bad guys and those scenarios would had been thrown out of the window a few years back? Would current Egypt, Lebanon, iraq and Syria be safer if Iran was out if the picture? I think so