I don't think it will happen. The large Turkish population would exercise too much power over the established members for them to go along with it.
the Eurocrats think socialism works too.
they must seriously believe that islam is "just another religion" or that with enlightenment Turkey will become atheists like all good socialists.
Also don't forget the links with the Germans during WWII. With Germany and France running the show pretty much, it may be that the EU is little more than cover for closer ties with a familiar German friend.