It is true that fundamentalism is on the rise worldwide (also in christian countries) but my impression is that, in Turkeys case, it was the EU attitude which caused lots of turkish people to vote for a strong islamic president.
Or it was just a temporary aligning of views that Erdogan and AKP initially seemed to be moderates, but it turned out that the sheep is actually a wolf with a sheepskin. It happened in history already a few times.
Also, diluting the progressive thought of the EU would likely have prevented it from being an effective counterforce to radicalization. (Though it could have moderated things a bit in Turkey.)
Dont get we wrong: I dont think it's magic, just than then, and for Turkey, it would have worked.
And more important: it would have been the right signal to send, to the whole world
I sincerily think that was our best chance, ever, to kill fundamentalism for good.
We will never know.
These free-market types, they are really wreaking the world. The 1% capitalism we have reached is putting a death sign in the fundamentalist market ideology, but they are for sure going down with a bang.