> Everyone in Greece believes that our country was the best ever. How many times have you heard something along the lines "when we used to have civilization they were eating from the trees".

That doesn't follow. The fact that some people say "we were civilized before you" doesn't mean they think it's the best country in the world. Not to mention that nobody even really says that, unless they're looking for a cheap insult. It's the equivalent to the American "we'll bomb the shit out of you".