It's one thing to have supported Islamic fundamentalism before 9/11. It's a great deal more disturbing to continue supporting known terrorists after 9/11, when the choice is crystal clear.
Bush said, "Either you are with us, or against us." It's far from clear that the Saudis are with us. They are STILL dragging their feet, obstructing investigations, and even helping the other side.
It would certainly become interesting if Russian oil production increased in earnest, and EU and the US started buying more of the Russian oil and much, much less from the Middle East.
One could see very interesting dynamics take over if the infidel cash cows were to start thumbing their noses at the Middle Eastern cartels.