Jesus, there doesn't always have to be 'other' contributing factors. This crew screwed things up right royally. There were so many clues during that approach that were all either ignored or badly handled. 'Misunderstanding' a system could be a contributing factor to 99% of crashes or incidents and we ALL have the ultimate tool in our arsenal if we get in too deep...... GO AROUND. At what point was this fool 'stable??'.
I most certainly don't know all the in's and out's of my aircraft's FBW system, I probably know 90% of it but every week I see something new, difference is that when the aircraft does something I don't like or is in an 'undesirable' situation I have no issue disconnecting and hand flying and then if required 'rebuilding' the automation back in. The ironic thing here is that these guys are almost 100% reliant on a system they seem to only have a very basic knowledge of... and that is dangerous.