Answer:
In all three stories, white people are set on a pedestal, whereas black people seem to be much beneath them. Even though some of the white people may treat their black counterparts in a good manner, like the Farquars from "No Witchcraft for Sale," it is evident there are cultural and racial differences that cannot be easily overcome. In "The Prisoner Who Wore Glasses," it is obvious that the ward's feelings towards the prisoners are very harsh and that he despises them and tries to make their lives miserable. In "The Moment Before the Gun Went Off," the story is set in the middle of political activism and black people fighting for their rights in South Africa, so the incident of killing a black young man will be seen as a political, rather than human things.
In "No Witchcraft for Sale," the cook Gideon wants to help the white family (and especially their son) overcome their racial differences, but he often fails to see their point of view, and they definitely fail to see his, so ultimately they realize they cannot be equal.
In "The Moment Before the Gun Went Off," the young black man's death serves to bring his parents together, but also to help spread the activism in South Africa.
In "The Prisoner Who Wore Glasses," the prisoners sort of help the ward Hannetjie become a better human being by fighting for their own well-being in the prison, where they will probably spend the rest of their lives, and he in turn helps them become better workers in the prison.
