Soon, the child has no empathy for anyone. The wall has been built to last. Human nature is a nuisance, and fills me with disgust. In normal development, the child bonds with the mother for nurturing and love. In the case of violent psychopaths, including serial killers, the child bonds through sadomasochism or aggression.
Many killers seem to go into a trance during their predatory and killing phases.
By degrading the victim, the psychopath is attempting to destroy the hostile enemy within his own mind. The victim is seen as a symbolic object. Chattering and flattering and entertaining, as if seen through a motion picture screen. But they would be reasonable facsimiles to women as a class. A class not of women, per se, but a class that has almost been created through the mythology of women and how they are used as objects.