Racial prejudice was a focal point of the book To Kill a Mockingbird. Largely, the prejudice was against Tom Robinson, but it is also possible to say that there was prejudice against Arthur "Boo" Radley. Boo had prejudice against him because people are usually prejudiced towards things that they don't know nor understand. With that consideration, it is also conceivable to say that Mrs. Dubose was also being prejudiced against. Mrs. Dubose acted against her prejudice, and partly because of her addiction, against the passerby. It is also possible to say that Scout had people feel slightly prejudiced to her, like Jem, because she was a girl. The insult "you're such a girl" is an example of this.

"Well, coming out of the courthouse that night Miss Gates was--she was goin' down the steps in front of us, you musta not seen her--she was talking with Miss. Stephanie...