in short, yes i would eat him. i'm am not going to let some past experience with his religion get in the way of my survival.
that said, depending on the type of isle, i would use part of his carcas as fish bait, part as animal bait, smoke some of it, and cook some too. i might use his inards to spell SOS on the beach.
(sorry GBL. i think it's two threads in a row now of yours that i show my sick bastard side.)
TS (of the Hannibal Lecter eats stupid people class)