Winds hear
Mountain bear
They had a "windshear" just before the minima. The GS versus CAS indicate about a 9 knot headwind reducing to a 7 knot tailwind that caused an increase in vs and a steepening of the FDA and pitch angle, although the CAS appears to have increased. All of this does indicate a very mild windshear, absolutely consistent to a moderate shower, but it no way approaching something that would trigger a WS warning, and nothing that accurate hand flying would not have coped with.
The is also a very strong tendency to "drop" the nose when attempting to fly the aircraft by visual reference in very poor visibility( this is why bloggs tends to splonge in short of the threshold when attempting a visual approach when he shouldn't be). This is a manoeuvre that has been done many many times before in aviation history. Think of it this way, no one has managed to destroy an aircraft in a unique way in the last 50 or so years, they just keep doing the same dumb things. The captain should have been heard loud and clear saying Go around! Because of any of the following 1, unstable 2,loss of visibility 3 vs greater than 1000 fpm. The flight continued because there was an unshakeable belief that the aircraft was going to land successfully, after all isn't that what always happens?
There was no windshear, just very very poor hand flying, and very poor command judgement.