There are no FBW type protections on this aircraft, it was an A310. Any type of aircraft can be flown into the sea .
The crew were confused and seem to be focussed on landing off an ILS for the northerly runway. There seems to have been confusion from the IF onwards based upon their selections on the FCU. They seem to totally lose their situational awareness once they break off for the circle. They would probably have all been alive today if they had gone manual and either maintained level flight or climbed to msa without a config change.