This is the article that perhaps better explains the position I have been putting forth about the nature of the relationship between American and Saudi Arabia
The Kingdom of Saudi Arabia - friend or foe of America? Having been asked exactly this question on such shows as CNN’s “Crossfire” and ABC’s “Nightline,” I’ve come to the conclusion that the answer is “neither.” Rather, Saudi Arabia is a rival.
Saudi Arabia has been friendly to the extent that, since a dying Franklin D. Roosevelt met an aging King Ibn Saud in 1945, its leaders have kept their part of a crucial bargain: They provide oil and gas and in return Washington provides security.
Saudi Arabia has broken their part of the agreement repeatedly. OPEC is the most tangible institution representing this.
But, when it comes to a nuclear Iran, this is a clear change of American policy, and it means that the security blanket that America has always provided SA is useless. All the bribes in the world is not going to keep America in their back pocket, because what a billion Muslims will see is that it is the ayatollahs that have the bomb now.
What a nuclear Iran means for the Saudis is loss of leadership for a billion Muslims worldwide. Allah is on the side of the powerful Muslims, in popular Islamic theology, and a nuclear Iran spells out that Allah is on the side of the Shia.
This is an intolerable situation for Saudi Arabia. Their American ace in their back pocket has proven itself to be weak and useless under feckless American leadership. That arrangement is over. As erratic as it may be, Saudi Arabia is taking charge of its security, and that means that the two rival movements of Islam are now at war at each other like never before.