The recent defense agreement between Greece and the United States is difficult to assess. On the positive side, the agreement has angered the Turkish government. If the agreement leads to protecting Greece from the Turks it will be a political triumph for Greece unprecedented since the days of Venizelos.
The danger of the agreement can be seen by the concerns of the Russians that the agreement is directed against them. To a certain extent, the Russians are being hypocritical considering the support they have given to the establishment of a nuclear plant in Turkey (with Russian priests blessing it). Overall however it is not in the interests of Greece to engage in or support a conflict with Russia.
In summation, if the United States is prepared to support Greece against Turkey, Athens has done the right thing. The Russians have their interests, and the Greeks have theirs. Greece should desire friendly relations with the Russians and many of us remain pro Russian while being concerned that Moscow did not support the Armenians against Azerbaijan.
The United States military has recently suggested that it needs to modernize the Turkish military. This is a bad sign. Greece needs to realize that Hellenic interests are threatened by Turkey, and no one else. Greece should pursue friendship with both Washington and Moscow and should let them know that relations with Athens will depend on how they react to Greece in the context of Turkish aggression against Greece and Cyprus.
The wise course of action is for Greece to maintain a policy of strict neutrality toward American-Russian rivalries that are playing out. Having made recent defense agreements with Washington, it can only be hoped that these agreements will help Greece in the context of Turkish expansionism.