Don't know anything about that particular aircraft but changing your mind after you've made a decision and started to abort and resuming takeoff especially on such a short runway the guy didn't have a chance if thats what happened.
The flight recorder will have the answers and the first officer, if he survives.
I wonder if you join me in hoping that God will mercifully take the FO, who even without probable burns and disfigurement will have a very rough time with the outcome of what might have been his own shortcomings?
I hope it was a issue of no-options-available, rather then having options and choosing wrong. This is the kind of thing I speak of regarding the training differences between military and civilian pilots.