They hunt victims. They are not even conscious of this, it is who they think everyone in the world is.
In some cases, a scapegoated child may be taken for therapy by the abusing parent(s) as part of the narrative of the child being “broken” in some way and in need of fixing. In these cases, therapists may be taken in by the parent, especially if supported by a spouse and/or seeming credible. The child may then be judged to be “in denial”. It may be many years before the true story emerges.