The correct answer to this open question is the following.
What originally made Trujillo a target for attacks was "gold and silver mined nearby."
We are talking about Rafael Trujillo, who was a dictator of the Dominican Republic from 1930 until the day of his death in 1961. Although he was not the President of the island, he acted as the feared military man that always moved the strings of power behind the scenes. He always instilled fear in people and was responsible for many bloody massacres during his tenure.
