Racism is the most obvious form of discrimination. Compare and contrast the other types of prejudice and discrimination other than racism.
other types of discrimnation that typify relationships among the novel's characters.
Boo Radley is another major victim of prejudice. He is the subject of the gossip of the town, with claims such as that he wanders the town at night and dines on cats and squirrels. Boo has been under house arrest (by his father) since he was a teen when he allegedly stabbed his father with a pair of scissors. The town views him as a monster, someone so different as to be feared (like Tom). Of course, it turns out that, like Tom, Boo is an innocent person who has only looked for ways to help people; Tom was trying to help Mayella and Boo helped Jem and Scout.
There is also prejudice against the poor. Calpurnia scolds Scout for making fun of Walter. Prejudice against the poor includes the Ewells. There is nothing redeeming about Bob and judgments against him are justified. But like Boo, Mayella is the product of an abusive father. This is not to say that Mayella’s lying in court is justified as it leads to Tom’s imprisonment and death. But Mayella, the Ewells and the Cunninghams are subject to prejudice. Atticus makes this point. With Mayella, it is more complicated because she is the product of a bad situation, but doesn’t rise above it as Boo does. You are correct that racism is the prominent form of prejudice. The court takes Mayella’s word and Bob Ewell’s word over Tom’s. The jury’s conditioned racism trumped the clear evidence and the obviously dubious and devious testimony from Bob. It may be difficult to see the Ewells as victims of prejudice since they are always referred to in malicious tones. But this is mostly a reflection of Bob Ewell himself. Beyond that, condescending attitudes towards the Ewells have something to do with their behavior (which I would also blame mostly on Bob) but also a general prejudice against the poor.