The - generally manageable, as more knowledgeable folk have pointed out - power differential, and the - presumably - inadvertent engagement of beta mode were just the last holes in the cheese.
They busted minima three times, in spite of ATC suggesting EIKY.
We might as well blame ATC for not denying landing clearance, since they couldn't land without busting minima.
Inadvertent engagement of beta by experienced crews does seem a recurring theme in this class of aircraft.
2012/05 eng | sht
"Last ned rapport"
But most of the holes were lined up for them before they signed up, never mind got up that morning.