A4......"to teach the unpopular captain a lesson "
That's a rather stupid thing to say..........as if anybody's going to set up a fatal accident "to teach a lesson" !!!!!
Why is it a stupid thing to say?
Of course it was a stupid thing to say! No self respecting pilot would carry out a very dangerous action to teach another one "a lesson". Key's may have been unpopular but that would not have been the way to show it to him.
(The LE flaps were erroneously retracted by the first officer, thinking he'd selected the TE flaps)
Unfortunately, Virgo, the first part of your post (above) was correct the second is not. It was NEVER established who selected the LE "droops" up. This was in the days before CVRs.