Isn't it more like the Turks want ISIS to defeat the Kurds and to defeat Assad, and then they want NATO to come to Turkey's defense when ISIS turns against them?
No, the Turks want to restart the Caliphate.
Once you get outside of the major cities (Ankara and Istanbul) they are very supportive of ISIS.
PKK helped YPG (Kurdish in Syria). YPG is an affiliate of PKK (another Kurdish grp). They both helped Peshmerga Kurds in Iraq rescuing Yezidis and fighting I.S. (ISIS). A fact that was hardly publicized.
It really depends on who is "officially" considered a terrorist. PKK and YPG are not terrorists, and certainly PKK, Before I.S. suddenly appeared on the scene, was actively attempting to make peace with Turkey after being persecuted, as a Kurdish group, by Turkey for many years.
Yeah. Something like that. Erdogan is quivering at the prospect of regaining the Caliphate for Istanbul without having to do the initial labor to make it happen. ISIS is doing just fine. The Turks are sure they can mop up ISIS and take control themselves with or without NATO and probably get American and Euro approval for their actions in smashing the dreaded ISIS. There might even be a bonus if the USA secretly manages to funnel enough arms and equipment to the ISIls to knock out Israel as well.