What are passages in Harper Lee's To Kill a Mockingbird that show how Scout has come to understand that judging others is dangerous because it...

In Harper Lee's To Kill a Mockingbird, one example of Scout demonstrating how she has learned that judgement can lead to immoral behavior can be seen in her guilty feelings concerning her treatment of Arthur (Boo) Radley. Due to rumors and myths, Scout, Jem, and Dill have judged Arthur, whom they call Boo, to be an insane, dangerous person who piques their curiosity because they want to see just how insane and dangerous he is. Since their curiosity is piqued, especially Dill's, the two boys undertake several stunts to try and get a look at Arthur, and Scout goes along for the ride. Later, Scout feels very guilty about their behavior, showing us that she has been able to understand how much judgement can lead to immoral behavior.

Soon after the trial, Scout begins the third grade and opens Chapter 26 by reflecting on the progress of the start of the new school year. One of her reflections concerns the fact that she no longer fears walking past the Radley Place even though she still sees it as being "no less gloomy, no less chilly under its great oaks, and no less uninviting." More importantly, she reflects upon how guilty she feels about having participated in activities aimed at invading Arthur's privacy, activities she became involved in just because she, along with others, had judged him to be an insane curiosity, worthy of poking fun at:

I sometimes felt a twinge of remorse, when passing by the old place, at ever having taken part in what must have been sheer torment to Arthur Radley--what reasonable recluse wants children peeping through his shutters, delivering greetings on the end of a fishing pole, wandering in his collards at night? (Ch. 26)

A second example of Scout realizing judgement can lead to immoral behavior concerns her reflections of her third-grade teacher, Miss Gates. Early in the new school year, Scout's third-grade class enters into a discussion about Hitler's treatment of the Jews. Scout is very dismayed to hear Miss Gates say something very hypocritical. Miss Gates speaks out against Hitler's treatment of the Jews and speaks in favor of democracies because the people within democracies do not "believe in persecuting anybody." And yet, when leaving the courthouse on the day of the trial, Scout very distinctly remembers hearing Miss Gates say to Miss Stephanie Crawford,

"[I]t's time somebody taught 'em a lesson, they were gettin' way above themselves, an' the next thing they think they can do is marry us" (Ch. 26).

Scout recognizes that Miss Gates's action of speaking out against persecution while also persecuting people in her own town is hypocritical and, therefore, immoral. She also recognizes that Miss Gates's immoral behavior stems from wrongly judging African Americans, as Scout shows when she asks her brother,

"Jem, how can you hate Hitler so bad an' then turn around and be ugly about folks right at home--" (Ch. 26).

Hence, Scout's comment to her brother further shows just how much Scout has come to recognize that judgement leads to immoral behavior.