Everyone I talked to on a recent trip to Riyadh -- from princes to merchants to bloggers -- mentioned the Palestinian cause, rather than Iran, as their top foreign policy concern (an impression supported by recent opinion polls). Saudi royals and government officials know well that Al Qaeda and other jihadi groups exploited the Palestinian cause not only to help recruit the Saudi muscle for the 9/11 attacks -- 15 of the 19 hijackers were Saudis -- but also for subsequent attacks on the kingdom itself.