There are many episodes that we can point to that show emotional distress on account of the Finchs standing up for what they believe to be right.
The most obvious example of emotional distress is at the end of the book, when Bob Ewell attacks Scout and Jem. Atticus is in distress that someone would stoop so low to attack his children. Fortunately, Boo Radley is there to protect them.
We can also point to the the trial of Tom Robinson. Jem is shaken up pretty badly when the verdict of guilty is given. In a real sense, his world is crushed. Here is how chapter 22 opens.
It was Jem’s turn to cry. His face was streaked with angry tears as we made our way through the cheerful crowd. “It ain’t right,” he muttered, all the way to the corner of the square where we found Atticus waiting.
Finally, Jem and Scout are also shaken up when they witness a mob that seeks to hurt Tom Robinson and Atticus who is standing in the way. Jem is old enough to see what is taking place. When he talks with his father, he says:
“Don’t call that a blind spot. He’da killed you last night when he first went there."