I imagine that the reason for this crash, like most, will be a serious of incremental events that on their own would be benign but in combination prove fatal, "Swiss cheese" etc. I wonder if some kind of visual illusion might be one of those small events.
Visual Illusion Awareness
“Black hole” along the final approach flight path:
In case of approach over water or with an unlighted area on the approach path, the absence of visible ground features reduces the crew ability to perceive the aircraft lateral and vertical position relative to the intended flight path.
Uphill or downhill terrain before the runway threshold:
An uphill slope in the approach zone or a drop-off of terrain at the approach end of the runway creates an illusion of being too high (i.e., impression of a steep glide path, as shown on Figure 1), thus:
Possibly inducing a correction (increasing the rate of descent) that places the aircraft below the intended glide path; or,
Preventing the flight crew from detecting a too shallow flight path.