Sure, and look how well THAT has worked out for us!
Yes, the house of Saud is our indirect enemy in many ways, but there are worse outcomes -- the Iranians would love to come into possession of their vast fields of oil. And what would we do about it?
On the other hand, maybe you're right. A jihadist coup of the Saudi royal family would probably hasten Armageddon. With nuclear weapons. If it's inevitable anyway....
Saudi royals getting beheaded....I don't see an issue here.
:-)