Why does Jonas feel negative about his father after he becomes the receiver?

As Jonas becomes the receiver of various memories from the Giver, he gains great insight into the infrastructure of the city in which he lives and of his family. Jonas’s father is initially introduced as a mild-mannered Nurterer of the children in the city, and he seems to care for his family. Yet, as Jonas becomes aware of other possible ways of life, he realizes the monotony of his parents’ lives. For instance, when Jonas asks about the idea of being in love, which he knows can be a reality based upon his knowledge, his father chides him for talking out of line. Also, Jonas discovers that his father commits infanticide on a regular basis through his work- something which further demonstrates the dangerous corruption of the city. This knowledge creates a disgust in Jonas for his father that is irrevocable in the novel.