I can't really see what one thing has to do with the other? And let me reassure you: Turkey doesn't need 'to prove' anything,- to anybody. After all we were trustworhty enough to be a Member of NATO for more than 58 Years, and a trustworthy Ally of the West! And just one additional Point: Statistics show that most of the turkish Public Opinion is fed-up with the EU, continuous new criteria additions, etc., for joining this 'apparently' so illustrious club! In short: Most turkish Citizens, today, including myself, wouldn't even want Turkey joining the EU,-anymore! So: That's that!
Turkish jets take part in U.S.-led coalition strikes against ISIS for first time (Reuters)
from the article: Israel-Turkey diplomatic crisis nears its end