Atticus always sees the best in all people (aside from possibly Bob Ewell), and it is not surprising that Atticus takes a positive view of the Cunningham family. He had previously explained to Scout about how the Cunninghams were poor but honest and how Walter Cunningham would slowly but surely make payment for Atticus's legal representation. Atticus would not have been blamed for abandoning his beliefs after several of the Cunninghams threatened to take Tom Robinson and lynch him, but Atticus realized that a gang of men were " 'still human,' " and that they had gained "considerable respect for the Finches" when Atticus stood up to them at the jail. "Atticus said he had a feeling, nothing more than a suspicion" that the Cunninghams could be counted on to support him, and this was why Atticus allowed one of the family to remain on the jury. Atticus's hunch proved correct: Cunningham was the lone holdout.
As for Aunt Alexandra, she believed that Walter Jr. was "trash," and that the Cunninghams were different from the Ewell family who had been "the disgrace of Maycomb for three generations." Alexandra believed young Walter would be a bad influence on Scout, and she adamantly refused to allow the Cunningham boy to come to the Finch house to play with Scout. Walter Jr. was not part of the "fine folks" and "gentle breeding" that Alexandra deemed so important to a person's upbringing.