There was a time when the deal between the Saudis and us made sense: after 1945, we need oil, lots, cheap, in guaranteed amounts and at stable prices. In return, we protected them from regional and extra-regional predators - Nasser, the Soviets, etc. They became rich, we powered industry. Good deal. Problems started later: as soon as the kingdom stabilized, King Faisal conceived a great design of taking over Sunni Islam to the Wahhabi creed, and Saudi imperial goals.