Would it be a good idea to not demonize child abusers so much, and maybe give them lighter sentences?

Before I say anything else, No, I have not lost my mind.

Here is why I ask this, lets imagine a hypothetical situation. two little 5 to 6 year old kids are playing in a park, when a man shows up and starts talking to them. he tells them some story about some puppies he has or candy, and before you know it the kids are sat in the back of his car.

The man takes them back to a house in some rural location, and then does some things to them. the kids are traumatized but they will live, that is, until the man realizes that no one can ever find out what he has just done. if anyone ever knew his life would be ruined. he realizes the kids know his face and could give the police vital information. he realizes that the kids are the only witnesses to what has happened, and in a moment of either desperation or cold blooded calculating thought, he kills the two kids. he dumps the bodies in the middle of the forest and goes home.

A few weeks pass and the police have still not found the bodies, the man, now thinking he has got away with it gets in to his car and heads to another park.

Months later the bodies are found, and a few days later vital DNA evidence is discovered, after the man is arrested, it turns out he has been doing this for months, and there is now a long trail of corpses and tragedy.

Would the man have killed anyone if he knew that by letting the kids go, that he would have only be risking enforced psychiatric treatment behind a blanket of anonymity?

Would it be a good idea to not demonize child abusers so much, and maybe give them lighter sentences? or should we just feed them to wild bears and have done with it?