@Despegue
It SEEMS that no Urgency/Emergency call was made, which makes a fuel starvation scenario as suggested unlikely.
I'm not pushing fuel exhaustion as a pet theory but your statement is fundamentally flawed. In another culture, a pilot or crew that has screwed up with their arrival fuel could well be in a mindset to completely ignore the fact that have gone below minimum reserve (1100kg or whatever) because the loss of face is not acceptable.
Where this has happened elsewhere it usually comes to light that the culprit is a serial transgressor. Thankfully most of us would swallow our pride, stuff out a Mayday call and go straight to the front of the queue. This bloke may well have been stooging around the AMS pattern at 2000' for ages, waiting his turn, burning fuel like there's no tomorrow.
As I said, not a pet theory but the CVR will tell all quite soon I think.