I am not saying you are wrong. However, NATO was set up to counter the Soviet threat. Turkey shares a European border with then-Soviet bloc Bulgaria to the north and Asian borders with USSR to the east, Iran, Iraq, and Syria to the south. Since Turkey was a target (along with Greece) of the USSR in the 40s and 50s (Truman Doctrine), I’m sure we would have defended Turkey from Soviet invasion attack in either Europe or Asia. If Syria were to attack Turkey, would the NATO treaty require NATO intervention? Don’t know. How about if Greece attacked?
Now and maybe more to the point, if a Turkish flagged vessel with Turkish troops aboard tries to run an Israeli blockade of Gaza, would that trigger NATO action? Now we both know that with Dear Leader at the helm, it doesn’t matter what the treaty says, it is what he wants it to say—the Europe/North America bit is just a drafting error.
Or think about Iran back in the 80s.
The NATO treaty was, as you said, designed to counter the Soviet threat. However, we can see from history...consider the Balkans as an example...that they can go beyond that if they so decide.