In the long arc of history, while regimes come and go, civilizations endure. Bet on the former against the latter, and you're taking one helluva gamble. The House of Saud is a regime, a dynastic enterprise masquerading as a nation-state. Iran, by contrast, is the modern incarnation of an ancient civilization. The antagonism between the two is deep-seated, genuine, and destined to persist.
How the United States found itself aligned with the former against the latter is a story fraught with miscalculation, folly, and hubris. Taken as a whole, it's our version of Lawrence of Arabia, albeit without a charismatic protagonist on which to hang the tale. Our own equivalent of T. E. Lawrence would be an in-over-his-head mischief-maker like Graham Greene's fictional Alden Pyle, albeit relocated from Indochina to the Persian Gulf. Imagine a composite figure combining the signature traits of Kermit Roosevelt, Oliver North, and Max Boot, and you have the makings of an epic of sorts, even if shorn of the wide-angle grandeur that was a hallmark of David Lean's film.