The police disclosed the details of the case in which the biological father fell and killed a young child. What are the details that make people angry?

On August 24th, according to a reporter's friend, new progress was made in the case that a two-and-a-half-year-old child was killed by his biological father. At about 7 pm on August 19, 2020, at the crime scene, the suspect Liu and his girlfriend Feng discussed the issue of child support after drinking. Two people had an argument. During the quarrel, the suspect Liu suddenly picked up the child and slammed it on the sofa at home. The child died unfortunately because of ineffective rescue. What happened was that at about 7: 00 pm on August 19, 2020, Jintai Branch of Baoji Public Security Bureau of Shaanxi Province received an alarm, saying that the father of the child had injured the child in Jinlingwan Community until he was injured. The police immediately rushed to the scene, and the child was taken to the hospital for emergency treatment, telephone 120. According to the police staff, after asking the suspect Liu, I learned that the injured child was born by Liu and his girlfriend Feng. On the same day, because Liu had drunk, he was discussing the issue of child support with his girlfriend Feng, and there was a contradiction between them. In the dispute, Liu picked up the child who was only two years old and fell to the sofa at home, causing serious injuries to the child. The suspect Liu has been criminally detained by the local police station, and the two-and-a-half-year-old child was killed by his biological father. The policeman's child is being dealt with. On August 2 1, a reporter friend got news in the hospital that the two-year-old child had not been rescued and had unfortunately passed away. As soon as the news came out, it aroused the anger of netizens on the Internet. Many netizens also said that the father's behavior has constituted the crime of intentional homicide and the man needs to be dealt with strictly. After interviewing lawyers and friends, the reporter learned that from the video, Liu's throwing behavior towards his children has obviously constituted the crime of intentional injury. Liu injured his child because of a dispute with his girlfriend. His motivation is more of his own venting, stimulating his girlfriend's mood by hurting his children.