How do the events of the last section of To Kill A Mockingbird support the theme that sympathy towards others is an important lesson to learn?

The events of the last section support the them that sympathy towards others is an important lesson to learn because all of the people finally come together here. After Boo Radley stabs Ewell, the Sherriff lies and said that Ewell fell on his own knife, which is showing sympathy to Boo Radley.