When seeing Billy accepted by the crew it reminds him of the their dislike for him and he becomes jealous. The Danksters conversation with Claggart also shows his fear that he will lose the power he held from the fear of others when he says ? they turn from hating you to loving him, and leave you impotent. Claggart becomes determined in destroying Billys reputation. Claggart ? lives on hurting people and his evil nature prevails through his attempts to bring down Billy throughout the play such as when he orders Squeak to ?
put that new seaman Budd on report and when he lies to the captain and falsely accuses Billy of starting a mutiny. Billy is innocent in a sense that he has done no wrong which leads to his blind and naive view of evil. The Dankster tries to warn Billy that ? nobodys friend is Jimmy-Legs and by saying ? he is down on you but he does not see Claggart to be a threat of any sort. Billys innocence and devotion to good do not let him see the evil in Claggart whom is trying to destroy him but eventually conflict resulting in the murder of Claggart from a blow by Billy.
Billys retaliation leads to another conflict between good and evil where Captain Vere must decide Billys fate after he commits a crime punishable by death after killing Claggart. Vere likes Billys character and would not like to see Billy put to death. Vere accepts that Claggart provoked Billys retaliation by lying and can see the evil in Claggart but also recognizes the call of duty which at war-time was non-tolerable for such an offence. Vere is troubled with the conflict of conscience and duty and under the circumstances of war he does what is right and has Billy hung.
Captain Vere loves Billy and has no problem with him in any way but finds where authority has evil it will command. In conclusion Billy was innocent but by failing to see the evil which was upon him he became unable to protect himself from it, being Claggart, who held an authoritarian position higher than him. Captain Vere was also exposed to evil through Claggart by not stripping him of his rank before he began to provoke Billy which then lead to Veres decision to put Billy to death. Therefore even the good exposed to evil in a position of authority will sarcome to evil retaliations.