Well, that's clearly part of it, but the release of the tapes appears to be a gift from the Gulen movement, who don't appear to be much more appealing than the current crop of corrupt islamists, or the previous crop of corrupt nationalists.
> The EU's fears are looking forward, not looking back.
I'm not sure what you mean by that. If you're saying that racism and fear of difference play a major role in pushing Turkey away, sure. Though it should also be clear that Turkey is doing itself no favour with the current ban. I hope you're not trying to say that a religious, socially conservative government with a hand in the till should be the future of Europe.
Personally, I'd be in favour of deep political reforms in the European governance mechanisms before further enlargement in any direction. The notion of economic advantages has been pushed forward so much that it has resulted in the weird, undemocratic system we have now, and as a result each new crisis is an opportunity to demonstrate the lack of political unity of the member states.