Why does Napoleon revive the threat of the farm being sabotaged by Snawball?

Napoleon revives the threat of Snowball sabotaging the farm to consolidate his power and maintain control over the other animals. By portraying Snowball as a constant enemy, he distracts the animals from their hardships and unifies them against a common foe. This tactic also justifies his authoritarian measures and the use of Propaganda, reinforcing the idea that only his leadership can protect the farm from external threats. Ultimately, it serves to solidify his Dictatorship and suppress dissent.