More than one...
How about we give them 1 Bush, 1 Carter, 1 Hussein, and 2 bonus Clintons in exchange for our oil and defense costs refunded?
No?
OK, we'll add in another Bush, but that's my final offer.
Otherwise, we just kill every Wahhabist we find, feed their corpses to pigs, burn every Koran on Earth, and just flat out take your oil, wiping your repulsive cult from the memory of man.
Better?