There are vast economic forces driving the US towards this war. Defence spending is enormous, and privatised. War is a business, and one that is incredibly profitable for some very powerful people. With the US pulling out of Iraq, and slowly reducing their presence in Afghanistan, suddenly you have an enormous military with nothing to do. People might start asking why the military needs to be as big and as well funded as it is. So the extremely powerful people want another war to keep the military-industrial complex puffing along. If it wasn't Iran, it would be someone else. The US is addicted to war.
