beardy, it is you who is being judgemental, I would say. Your speculation concerning (unreported) weather / turbulence and incorrect upset recovery is entirely without substance.
StopStart, I agree that quite why such an extreme manoeuvre could have been caused, given the Airbus flight envelope protection features, is highly worrying. The QF72 incident, though similar, led to significant modification - so should have no bearing on this incident.
Presumably there'll be a Service Inquiry?