Ice Pack:
Well said livesinafield. Also as stated earlier in this thread he could also have been suffering some sort of incapitance.
Indeed the report did mention once such possibility; that is, self inflicted incapacitation:
“In spite of availability of adequate rest period prior to the flight, the Captain was in prolonged sleep during flight, which could have led to sleep inertia. As a result of relatively short period of time between his awakening and the approach, it possibly led to impaired judgment. This aspect might have got accentuated while flying in the Window of Circadian Low (WOCL).”
That long “nap” wasn’t long on professionalism either.