These “friends and allies” supported (support?) ISIS because they are a Suni counter to Hezbollah, the Shiite army controlled by Iran.
So now we have to go in and spill American blood because the nutbar brush fire got out of hand? (And by extension help Iran and Hezbollah?) We’ve spilled enough blood for very questionable reasons in the Middle East.
By the way, if you want to read an absolutely fantastic article on the radical Islamic group Clark says our “friends” enabled I suggest What ISIS Really Wants in The Atlantic.