Most people here are left-wing and it's hard to say this. Greeks often complain they are the only NATO nation whose boundaries are not secure. Like most Balkan nations, but unlike the West Europeans, Greece both despises and fears its neighbors. Greece and Turkey have a serious dispute over Aegean islands. But Greece also sees territorial threats from Albania and Macedonia, two economic basket cases that couldn't begin to threaten the Greeks.
Reason takes a holiday and demonstrators take to the streets.
In a post-Cold War world, Greece would be a luxury the West no longer can afford. There are Balkan countries including Bulgaria and Romania that are eager to join the West, in every sense, and gave NATO much more help in the Kosovo war than did the Greeks. It is legitimate for the West to tell the Greeks that it saved them from Stalin and protected them from Turkey and that it expects more in return than tantrums. Most Balkan states, except Serbia, clearly want to join the West. The Greeks already are there, but only precariously and perhaps temporarily.