Compromising your viewpoints and behavior is bad generally: it will in the end only lead to frustration and will be a hindrance in achieving one's goals.
There are many situations in which compromising the viewpoint is bad, and one of the is an interpersonal conflict: it might solve the problem in a short-term, but not in a long term.
Mama does not approve of the Stevenses. Since they are Quakers, she considers them to be both "heathens" and "abolitionists", and she "forbids the children to have anything to do with them