yes, you can definitely utilize the millennia-old Shia-Sunni conflict to knock the Saudis down a couple of notches.
They have been busy solidifying a wall around Iran. Pakistan is, basically, their bitch. Pakistan and Saudis have an agreement, that should the Saudis need, the Pakistani nukes will be made available within a few hours. No wonder the Iranians want to develop nukes; the Saudis practically have them!