Humanizing a serial killer?

Okay... can someone explain what the hell the whole point of trying to humanize Kevin Crumb was all about? I mean, why in the hell did they write the former victim of the psycho as some forgiving woman that was sad when the evil f**k got it in the end? What the hell? Is that the current snowflake generation? Am I to expect the next movie painting Hitler as just misunderstood?