Whom does Napoleon blame for the destruction of the windmill?

Napoleon blames Snowball for the destruction of the windmill because he uses Snowball as a scapegoat to consolidate his own power and control over the other animals. By claiming that Snowball is responsible for the misfortunes on the farm, including the windmill's destruction, Napoleon diverts attention from his own leadership failures and reinforces the idea that there is an external enemy threatening their way of life. This manipulation serves to unify the animals against a common foe while ensuring they remain loyal to Napoleon. Snowball's portrayal as a traitor fits into the broader theme of scapegoating present in the story, highlighting how those in leadership positions can exploit fears and misinformation to maintain authority and justify their actions.