To Kill A Mockingbird Theme

In the novel To Kill A Mockingbird written by Harper Lee, there are a couple examples of this theme. For instance, when Atticus goes to the courthouse at around 10pm, a few men from the woods show up along with Walter Cunningham, looking for Tom Robinson. They started yelling and getting frustrated with Atticus while Jem and Scout are watching from the distance - Scout steps in when her father is hesitating. Scout notices Mr. Cunningham within the group of men and starts talking to him in a calmly manner. Another example of this theme is applied when Scout and Jem are walking home from the pageant at night, and Jem hears suspicious noises coming from the streets. It turns out that it was Bob Ewell following them home and next thing