We need to think of abuse in tiers, or layers, or antecedents and work on those. When I read about a tragic abuse situation in the news I always think, I want to know the story behind the story. What happened in the lives of the perpetrators or the ones who didn't protect the victims that made it possible for them to act as they did? How was this abuse situation created, and what needed to be different in those people's lives that would have made it never happen at all?
Abuse is usually a multi-generational skill, as is being victim fodder. How can the church help prevent the abuse set-up at its source?
The authoritarian mindset (maybe more about that later) doesn't cause abuse, but it creates a climate in which it can flourish. Teaching and supporting individual responsibility for one's behavior helps avoid that mindset. So, for Christians, teaching the doctrine of the Priesthood of the Believer, and supporting its application would help.
Avoiding restrictive, limiting, or derogatory stereotypes in illustration and metaphor in sermons and teaching would help.
Pastors, priests, mullahs, and other leaders and teachers need to be trained in college and seminary about abuse components and environments friendly to abuse. Because abuse is so widespread in religious families and practices the area needs to be a part of pastoral and leader training. And the training about it needs to be competent and well informed, not a minimalist rehash of outdated religionized pop psychology based ideas.
Personally, I believe the usual interpretations of "becoming one flesh" passages in the Bible and the usual application of those interpretations are off the mark and help create a climate friendly to abuse. They make it difficult if not impossible for married couples to retain their own individual autonomy as persons, and thereby cause conflict in marriage and put potential victims at additional risk.
No one should have to give up their self to become "one" with someone else. Historically it's a flawed doctrine and doesn't have a very pretty origin. It has to do with the belief, via Aristotle and Thomas Aquinas, that woman is not made in the image of God, but only becomes so when joined in marriage (becoming "one") with man, who is, of course, made in the image of God. As it was put, "They become one person, and he is that person," and that's why newlyweds were referred to as Mr. and Mrs. John Doe. She has ceased to exist as a person because she has become absorbed by his person.
People don't become "one" person when they get married. The verse says "one flesh" not "one person," but because the original reason for thinking they become one person has been forgotten, it is still preached as though it's that way.