Are you asserting that if it weren't for the Brits, what is now Saudi Arabia would be part of some pan-Arabic empire? Or that it would be a collection of independent nation states? Whichever one you're asserting, it's equally true that without French support, the thirteen colonies would have remained part of Mother England. And up until the conclusion of the Civil War, it was conceivable that the states might have become independent nations in their own right. I think it will take a significant external force for any rebel group to win in Saudi Arabia. Heck - it took significant external force for the rebels to survive in Libya and Syria, and those pitted apostate rulers (Gaddafi was an atheist and Assad is an Alawite) against Muslims. Whereas the Saudis at least maintain the appearance of being devout Muslims.