Comment: Turkey is rapidly becoming an islamist state or caliphate as they were under the Ottoman empire which is really unfortunate.  For now Turkey seems to have allied themselves to ISIS in their efforts to overthrow Assad.
It is a similar song in the Middle East where the enemy of my enemy is my friend but these kinds of alliances are always one of convenience.  Once their common enemy is cleansed, they will turn on each other.
Turkey is not a true friend of the US or its NATO partners so if the US has to lose the use of their airbases, so be it.  Not only have the Turks historically been supressing the Kurds and Christians but they were also responsible
for the mass genocide of the Armenians who were largely Christian.  The word and meaning of genocide came from the mass slaughter of the Armenians by the Turks who have never been willing to admit what they did to Armenian people despite overwhelming evidence to the contrary.