Why is Tehran threatening Riyadh while planning to attack, possibly even invade Saudi Arabia? Well, the main reason is that the mullahs believe that the Americans would not defend the KSA. The situation has been exacerbated by recent American threats against Saudi Arabia which in turn are rooted in a dysfunctional US policy towards Iran which led Riyadh to decrease OPEC oil production quotas. The reality is that US policy is destabilizing the region and pushing Riyadh and Tehran towards the brink of war and thus endangering American interests. President Biden would be particularly well-advised to reassess his policies towards Persian Gulf nations with a particular emphasis on distinguishing between the basically friendly Arab Gulf monarchies and the fundamentally hostile Iran. President Biden failed to prevent war in Europe, will he fail to prevent war in the Middle East as well?