While optimism is an admirable trait to have, it can sometimes lead to naivety and, in this case, it almost costs Delano his life because the idea of there being a mutiny on this ship was nonexistent in his mind. Delano shrugs off all of the abnormal happenings and Cereno's uninterested reaction to them, such as when a black boy inflicted a knife wound in a white boys head, muttering "that it was merely the sport of the lad" (16). The American captain fails to put all of the clues together until Cereno attempts to escape the San Dominick and into Delano's ship and Babo leaps after him with a knife. "That moment, across the long-benighted mind of Captain Delano, a flash of revelation swept, illuminating, in unanticipated clearness, his host's whole mysterious demeanor, with every enigmatic event of the day, as well as the entire past voyage of the San Dominick" (57).
Amasa Delano is a virtuous man, as he is referred to as "the good captain Delano" (15), but contralarily, he is racist. He does not dislike the blacks, he actually admires them and their submissiveness, which is condescending on it's own, but he does not see them as fully human. "Captain Delano's nature was not only benign, but familiarly and humorously so" (41). He continuously refers to the blacks as animals, saying that Cereno is the master of his "black sheep" (16) and that Babo is a "shepherd's dog" (7). "Like most men of a good, blithe heart, Captain Delano took to Negroes, not philanthropically, but genially, just as other men to Newfoundland dogs" (41). By comparing the blacks to Newfoundland dogs, he is expressing his positive opinion on blacks but in a patronizing manner. Delano's prejudice creates a mindset that blacks simply exist as good-natured, subhuman servants and that Spanish, or whites, are incapable of deception.
Not only does Delano's optimism set him up for failure, but his racism does as well.