The Russians put out a map showing the track of the Fencer south of the disputed "finger" by one kilometer. The Turks say the Fencer crossed that finger. My point is that even if the Fencer crossed that piece of airspace there is no way to shoot after the Fencer entered Turkey, have the weapon hit the aircraft inside Turkish airspace, and have the Turkish aircraft stay in Turkish airspace. Those three things could not have all happened.
This is a colossally stupid thing for the Turks to do. They just made it open season on their jets going into Syria. This is a bad thing for all parties involved.