Funny how no-one mentioned how Israel is in the Eurovision Song Contest.
Oh well.
Personally, I believe Turkey has just as much right to join Europe as, say, Cyprus. The Anatolian peninsula has been an integral part of European/Western history for ages, and developments there have helped shape the very identity of Western civilisation. Even when the Ottomans took over in the 15th century, they played a very important part in political, technological and, to a lower degree, cultural developments in Europe, up to the 21st century. Politically, they have done much effort to align themselves with the EU in the last decade, and to rebuff them from membership would not only be very hypocrite, but undermine the westernizer faction in Turkey, which could have unwanted results. The only reason not to consider Turkey part of Europe seems to be religion, but in the political entity of the European Union religion plays no part whatsoever.
As a matter of fact, I do not see a reason to rebuke any nation from EU membership if it is politically and economically compatible. If Iceland were to apply, why not? If, after Turkey, and after some changes, Armenia were to apply - why not? The world will only get better from it.
Let's centralise first, though.