If there is a Mutiny, I doubt if Columbus will be alive to try in 1493.
However remembre Coumbus did not just sail off into the Ouknown hoping that there would be something out there.
Columbus married the Daughter of a Well Known and Respected Portuguese Navigator, and as her Dowry, she brought along His Journals as well as the Journals of many of her Relatives.
Many of these Journals described Voyages between the Canary, Cape Verde, Azores and Madrid Islands.
Some of these had accounts of Ships blown far to the west by Storms, and the recording of what they found.
From these accounts of the Sighting of Sea & Land Birds, along with other indications, Columbus [as well as other Navigators] KNEW there was land out there, and He expected it to be more Azores type Islands.
As such his arrival at the Bahama Islands meet his expectations.
However the Common Seamen Hadn't read the Journals.
Even if Columbus's Ships had turned back. Another Navigator would have followed The reports in the Journals.