According to Brian Suits at KFI
These are Commie Kurds
PKK are commie kurds. At the moment they are also part of the combat assets against ISIS. I suspect the newfound Turkish interest in helping combat the “terrorists” is simply cover for killing Kurds. Turkey has no real complaint against the ISIS folks. Turkey would like to see the caliphate bceome real and would then move to incorporate it into the new Turkish hegemony.