There is a lot of waffling about external factors here, indeed some have merit (we deal with similar at other airlines ie briefing times).
However, what i don't get is if you arrive somewhere and end up with an arrival/approach that is completely unexpected and are now under some pressure, where is the basic airmanship, go into the hold at a safe height, sort your crap out and do the approach. No excuse to both be head down barrelling along at the ground regardless of how little time you had in the briefing room at the start of the day.
These guys/gals would have got quite a shock thinking about it afterwards. They and the people behind them would have augered in without the benefit of an important safety system (EGPWS) developed after countless others had died as the result of similar incidents.