"All along there’s always been the idea that Turkey was supporting ISIS in some way. Someone’s buying that oil that ISIS is selling, it’s going through somewhere, it looks to me like it’s probably going through Turkey, but the Turks haven't acknowledged that.
“Let’s be very clear: ISIS [ISIL] is not just a terrorist organization, it is a Sunni terrorist organization. It means it blocks and targets Shia, and that means it’s serving the interests of Turkey and Saudi Arabia even as it poses a threat to them.
"There’s no good guy in this, this is a power struggle for the future of the Middle East," Clark said.