I think Turkey has every right to apply for membership as they have lands within Europe. But they need to meet 100% all of the EU membership requirements.
If independence is needed to defend the lives of the people that live in the region - that is a fair cause. But if it is needed just to be proud that one is independent... doesn't make much sense to me.
The kosovo citizens have decided in a democratic referendum that they want to be a sovereign state. So, EU must respect the democratic decision of Kosovo.
And I expect that the democratic EU countries will accept this decision. We'll see...