Carl,
I guess that could be true, and any number of the Middle Eastern states that feel threatened by Iran such Saudi, Kuwait, UAE, Qatar, etc. could be providing financial and other support directly or indirectly to ISIS. Just as likely is the fact that ISIS and other Sunni groups had well established clandestine cell networks established in Western Syria to fight us when we were in Iraq, so I think it can be assumed they were well postured to respond quickly when the opportunity emerged. Lots of variables and all speculation on my part.
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