Moral superiority? What do you mean?
From the husband?
He clearly brainwashed her. She is convinced that he is a GOOD person. According to Paul none of us is good. My experience of the CofC isthat they accept a works salvation beginning with water baptism. There is a distinct mentality of moral superiority among much of the leadership. This results in opressive judgement, condemnation and, ultimately, hatred of the sort she evidenced by murdering the source of her desperation.