Given that the U.S. has been declaring for years that Saudi Arabia is a
ally and a
partner I would argue that the onus is on the U.S. to persuade its ally and partner to behave. If not the U.S., who else? No other country exerts the same level of influence on the Saudis the way the U.S. does. The Saudis may be very displeased about U.S. policy on Syria and Iran but they still depend on U.S. assistance for regime survival - any country that threatens Saudi Arabia will feel the full weight of the U.S. military - and U.S. arms sales to the Saudis are substantial.
Saudi aid to ISIS and similar groups is part of the longstanding Cold War being fought against the Western backed Sunni Arab states against the
heretic Iranians, thus is hardly surprising. Lets not forget that over the years, the Saudis encouraged Saudi volunteers to wage jihad against the Soviets, alongside the Taliban, etc.- this killed 2 birds with one stone; it helped spread wahhabism and kept these fanatics away from Saudi soil. Off course from 1980 to 1988 Saudi Arabia and a host of other Arab countries - with full backing of the West - bankrolled Saddam's war - he was a
friend then - against Iran. In many ways, that war never ended.
http://www.independent.co.uk/news/w...-dread-to-think-what-will-follow-9536467.html
http://www.independent.co.uk/voices...-been-bankrolled-by-saudi-arabia-9533396.html
Iran has openly spoken of a possible alliance with the U.S. Despite Iran being a member of the
Axis of Evil both countries have cooperated in the past. Iran agreed to turn a blind eye to any downed U.S. airman being rescued along the border area during the 2003 invasion and both sides later held talks on how to deal with the Taliban. Incidently, Saudi Arabia and the UAE were the first to recognise the Talibs when they seized power in 1996.
http://www.independent.co.uk/news/w...ouhani-says-we-are-ready-to-help-9537171.html
This article mentions the Revolutionary Gurad already in Iraq and planning the defence of Baghdad. And apparently it was not ISIS but Jaish Naqshbandi which captured Tikrit.
http://www.independent.co.uk/news/w...-prevent-collapse-of-iraqi-state-9536275.html
[nomedia="http://www.youtube.com/watch?v=p5IGQzUamB8"]Inside Story - Iraq on the brink? - YouTube[/nomedia]