If the captain was as disturbed as made out by BoF, I'm afraid I find the crew's decision to continue utterly bizarre- in fact, dare one say, as crazy as the condition they accuse the pilot of!
If I were a first officer on that flight listening to the rants of the skipper, I would want to be on the ground as fast as possible too. The captain's behaviour, while not being responsible, is strong argument to
NO GUNS in the COCKPIT
! Seems like he could have used a bit more time on the ground before returning to duty
.