Bound by the law, but having no understanding of grace. And grace is what it's all about.
I have found that whenever I see myself as morally superior because of what I have or haven't done, that I am most guilty of sin.
As you so eloquently stated, it is only through the blood of Jesus that ANY of us are cleansed. That's why we are to focus on keeping ourselves pure, and not running around condemning others..........especially those whose hearts we do not know whom we only have read about on the Internet.
May God be with this little girl.