I think we all try to make sense of this horrific thing. Intelligent people want to know what would drive someone to do the unimaginable. It’s mental health issues. So it becomes human to everyone. The same mental health issues could be attributed to most violent behaviors. We draw a line in our mind between something being justified and unjustified. The line gets blurred when the evil doer is a cute girl that doesn’t look like she would hurt a fly. Sad