re: Why?
Dutroux case has helped resolve massacres committed by later ones like Fourniret and it was very widely publicized all over the world.
It won't stop paedophiles or criminals (Fourniret's wife denounced her husband whe she heard about Dutroux sentence).
This case....well, why hasn't anybody reacted before me?
There is something the US can do about it. Of course, it won't ever solve all the problems but it will certainly help if weapons were not so easily accessible.
Raoul