It is crucial that none of the animals remember Jones and the revolution because forgetting their past helps the pigs in power maintain control. By erasing memories of the original ideals and the oppression they faced under Jones, the pigs can manipulate the narrative and justify their own tyrannical rule. rephrase a 8th grader and shorten

It's super important that none of the animals remember Jones and the revolution because forgetting their past helps the pigs in charge stay in control. When the animals forget about their original ideals and the problems they had with Jones, the pigs can change the story and make their own rule seem okay even though it's really unfair.