Get with the program or we will takeover and carve up your fiefdom (the US is Liege Lord) into a dozen Arab Emirates. There are already several on the Gulf, what would a few more mean? By "the program", I mean an end to any financial support for Wahhabism outside of Saudi Arabia. Cooperation to find all the Saudi terrorists and all who funded them. Support for the war on Iraq and Iran and Syria. No more holding our bases hostage. In return, they keep their lousy country.
Look, here's the deal...
You had best un-f**k your pathetic nation, or I will. Keep in mind your oil fields are yours only as long as I say they are. Your throne exists by my good graces. If you stay in power one more day, it is because I allow it.
No more funding terrorism. Turn over everyone on this list (hand him a piece of paper). You even think about disrupting the USA or our allies, and your nation will be glazed over in glass. I'll turn over your holy cities to the King of Jordan.
My military can reduce your nation to rubble within a weekend, and a few million dead arabs is just fine with me. Any more attacks on our nation, by any Islamic affiliated group, and we will tumble. I don't care if you were responsible.
Now, enjoy your dinner.
Perhaps that would get his attention.