Turkey is a member of NATO. It fields the Western world's top weapons systems.
Syria is Iran's junior partner. It is a state sponsor of multiple terrorist organizations and a proliferator of weapons of mass destruction.
Last September, as Turkey's Islamist government escalated its anti-Israel rhetoric, Turkey and Syria signed a slew of economic and diplomatic agreements. As Turkish Foreign Minister Ahmet Davutoglu made clear at the time, Turkey was using those agreements as a way to forge close alliances not only with Syria, but with Iran."