I assume that you are talking about the part in Chapter 24 where the missionary circle women are talking about the Mrunas and, at the same time, they are talking about their relationships with their own black servants.
When they talk about the Mrunas, they talk about how important it is to be exposed to Christianity. They talk like they really support the idea of spreading Christian ideas and values.
But at the same time, they are extremely unChristian towards their own servants. This is especially true of people like Mrs. Merriweather who talks so much about keeping the blacks in their place and Mrs. Farrow, who says that all blacks are out to rape and kill white women, essentially.
So they talk tolerance and love, but they really hate black people in their own town.