Alf
“What these folks did is inexcusable. …”
The danger in this line of thought – closing the event by allocating blame, fault, error, etc, is that it fails to seek a deeper understanding of the behaviour and thus misses an opportunity to learn, perhaps enabling avoidance of a future incident.
Perhaps "learning" has already occured by most pilots. How many learning opportunities does a pilot have to observe before breaking the code with a panel full of navigation gizmos, a pocket full of licenses and decades of experience on how not to land at the wrong airport?