Why do jem and scout makethe snowman such an obvious replica of mr Avery?

Mr. Avery was an unpleasant man who lived down the street from Jem and Scout. The snowman that resembles him is evidence of how Jem and Scout interact with others as children. They create their snowman out of dislike of Mr. Avery. This scene is a direct comparison to Boo Radley's soap carvings which he makes out of friendship.