sun_tzu
The Art of Bore
It looks like that strip is circa 4 miles long and presuming the plane was travelling at circa 400 mph it would not have been in their airspace long (circa 45 seconds)... Equally they must have known it's heading and that by the time the missile hit it would be in Syrian airspaceDefinitely seems the result of repeated incursions over the past couple of months to where Erdogan gave his pilots permission to engage any further attempts. The flight path basically makes it inconvenient for Russian pilots to swoop around the southern tip of Turkish airspace and more convenient to fly through it as if they have permission.
As I say at best it seems like a rash decision to engage