I'm a full-blown conspiracy theorist nutjob, but I think this whole ISIS thing is propaganda being used to persuade the American people to get behind yet another imperialistic invasion/occupation.
many online theorists concur with your thoughts
few recent links on the topic
Former Al-Qaeda Operative Claims Qaeda/ISIS Run By The CIA
http://www.activistpost.com/2014/07/former-al-qaeda-operative-claims.html#!bmOFul
ISIS are Sunni Impostors & Saudi-CIA Shills
August 19, 2014
http://henrymakow.com/2014/08/ISIS-are-Sunni-Impostors .html#sthash.hM5akZds.dpuf
The Covert Origins of ISIS
August 29, 2014
http://www.blacklistednews.com/The_Covert_Origins_of_ISIS/37596/0/38/38/Y/M.html
http://www.rumormillnews.com/cgi-bin/forum.cgi?read=312260
http://nodisinfo.com/isis-creation-israeli-mossad/
I don't give a shyt about ISIS really.

everything those same devils spoon-feed them. Hilarious.