Nonsense.
Their number one loyalty is to themselves, even at the expense of the Muslim world. That is made obvious by the way that they run that country of theirs. And in the end they know that the only thing keeping them in power is the threat of US military force, and that means the oil must flow.
Say what you want about this "deal with the Devil" that the Saudi's are playing out, but the oil has always flowed, no matter what. That says all that anyone should need to know about the Saudis and their loyalties.
And when the West no longer needs oil (fuel cells) - these people are going to be even MORE Dangerous. And better prepared....