I am with Crab here. That was just lousy flying. Maybe there wasn't any translational lift left, but you have to plan for that. Instead of trying to go 45 degrees or less, he just flew over the ridge, and got trapped. He did not leave himself an escape route.
Judging by the rant of that politician, pressure from the customer might have been a factor here.
And I am almost afraid to mention that, but in a Swiss forum somebody suggested that it was VRS. My comment wasn't published - debunking it obviously - probably because my tone was too annoyed.