Amir Tsarfati says that the Saudis hate Iran more than they hate Israel.
I guess that explains why they’re co-operating with Israel.
The Sunni versus Shia divide is deep and almost as old as Islam itself. Then there’s the race aspect of Arab versus Persian versus Turk. And the politics of a theocratic dictatorship versus a family dynasty vying for control of their “holy” sites. So the Saudis seeing Iran as the existential threat shouldn’t surprise.