Beinville
you have to step back and put your thinking hat on.
One of the most frightening and unique generated sounds in a cockpit is the death rattle.
Add the fear, fatigue, disorientation and hypoxia factors to a host of contradictory information then the brain prioritizes.
The crew were faced with false stall warnings, overspeed warnings, control law warning, turbulence, probable dutch roll and a stab that was moving to the aft limit for whatever b****y reason.
I very much doubt if anyone in the crew had ever flown manually at altitude.
The body tenses with stress and fear and primeval instinct is to wrap oneself up in the foetal position - which could have resulted in the PF inadvertently putting a nose up input on the stick while he was sorting out the roll and what was really happening.
They had very little time and whether or not they had any correct speed indications they did not have the time to diagnose what was right or wrong.
Remember the air india 747 which rolled on it's back with a faulty horizon after take off - one instrument failure only.
BA nearly lost a 747 - the LAX one- as the crew didn't understand the basics of the fuel system and that technology goes back to Noah.
They also had the whole night to play around with it and get it wrong.
The myriad of posts trying to fathom out the computer system shows that it is not understood by the average bloke.