Christopher Columbus
While Columbus was away from Navidad exploring Jamaica and Cuba, his soldiers stopped working on building a new fort and farms.  They made the Arawaks give them food.  They also stole things from the Arawaks and raped Arawak women.  This made the Arawaks decide to fight back against the Spaniards.  However, Spain had many weapons that the Arawaks had never seen, including steel swords, pikes, crossbows, dogs, and horses.  This made it much easier for Spain to win fights against the Arawaks.