The royal family who control to some extent Saudi Arabia have always walked a tightrope with Wahhabism and needed their support to gain power at the outset. Obama has about a year and a half of being president of USA and has always been a great talker, thinking that reasoning alone can solve Isil problem. His time could be better spent in meeting Putin and discussing a way forward were they both commit troops, on the understanding that in two years time all effected Kurds,Syrians etc have a voice and vote on boundaries of countries with areas governance passing to the idiginious ? People discussion could also include other areas like Crimea.