We had a recent incident here in Toronto where a man, pissed off at his ex-wife, decided to teach her a lesson. He kidnapped their five year old daughter, went to a highway overpass, dropped the little girl over onto the road below, then jumped himself.
He died. The little girl, miracle of all miracles, survived, and after a few weeks' stay in hospital, is home with her mother. She doesn't remember what happened... thank goodness.
You want to commit suicide, go ahead. But kill your child? You don't have the right.