show the difference in attitude toward the cunninghams as expressed by Atticus and Aunt Alexandra

Upon learning that his father believed Tom to be innocent, Scout wants to invite Walter Cunningham over for lunch more often, but Aunt Alexandra puts her foot down, saying that the Cunninghams aren't the right sort of people for Scout to spend time with. Scout can be gracious to Walter and polite, but can't invite him over because "he is trash." I'm nt sure Atticus states anything in the chapter but he considers the Cunninghams hard working folks who, if given a chance, honourable people. Atticus says that it is difficult to remove generations of ignorance but we can see progress with Mr. Cunningham; he voted in favour of Tom.