Of course not. I think BA has stated as much; along with the oil, it was phase I of the neoconservative agenda of attempting to remake the middle east in America's image--supplanting a democracy in Iraq was supposed to rile up the Iranians, and from many perhaps hasten a showdown.
Nevermind the fact that Iran has no navy, no real large standing army which could invade its neighbors without getting clobbered. The same individuals who are trumping up this Iranian "threat" were talking about how much of a threat Hussein was before invading Iraq.