Leaving aside the 9/11 issue (which is a big one), the Saudis have been turning a blind eye to the hundreds of young Saudis, mostly Wahabi Sunnis, who have gone to fight the Jihad in Iraq against the western crusaders (America and its allies). They have made no serious attempt to stop the flow of would-be suicide bombers, in spite of U.S. requests for them to do so.
It sounds like they are whining about their coreligionists being picked on and heretics (Shiites) favored instead. Maybe they were counting on the U.S. winning handily and solving their next door neighbor problem for them, and then the Sunnis in Iraq taking control again, after tossing the Shiites and the Kurds a bone or two each. Keep your mouths firmly shut, please, Saud princes!!
