Essentially, one part of Turkey belongs to Europe so it's not totally a one-way argument. I think these kind of discussions are a bit of a vicious circle, 10 years is a long time and then EU is not ours - the people's - it's theirs - the politicians' ( and whoever has backed this union up from the beginning. )
People here in the UK don't even feel "European", and I'm sure some 70% would vote against Europe if any kind of referendum took place at any given time.