so why dont we work on known fact instead of rumor and speculation when trying to learn from this accident.
Fact: Vis was bad
Fact: more than one approach was made
Fact: 75% of aeroplane accidents are caused by pilot error
Fact: they crashed.
English speaking is not a factor (you don't need to be able to speak English to read flight instruments), therefor either they had extreme bad luck and some sort of failure on approach which caused them to crash, or they messed up the approach and crashed. You also can tell from the flight instruments when you are above, at or below minimums and so even if they were not passed proper weather info, that judgement should have been made in the cockpit.
Therefore I'd suggest that there is a 25% chance that they had a failure which caused this.