All superbly insightful, except for the final sentence. We don't demonize heterosexual relations with adults the same way, and few crimes have such a low rate of apprehension and conviction as rape: yet heterosexual rapists sometimes kill the women they rape. I think murderous babyrapers kill their child victims for the same reason that murderous rapists in general kill woman, and murderous homosexual rapists kill men: sadistic pleasure, unbounded by any moral restraints.