why does Jim hate Antonia and Cutter, when she was Cutter's victim?

On the third night, Jim awakes to find Mr. Cutter trying to grope him. They get into a fight, with Mr. Cutter beating Jim fiercely about the face. Jim runs back home and in the morning feels disgusted, ashamed, and angry at Ántonia for being involved with Cutter in the first place. He refuses to see her or a doctor and is worried about word getting around town.