Why oppose?

SO I HAVE NOT POSTED IN QUITE SOMETIME BUT A LOT HAS TRANSPIRED SINCE THEN.  THIS GUY IS HAVING A RANDOM CONVERSATION WITH ME ABOUT HIS STANCE ON CHILD PREDATORS...HE STATES THAT HE WOULD SHOOT ANYONE WHO THREATENS A CHILD IN THAT WAY...OKAY SO I AM LIKE WHAT IS THAT SOLVING?  HE IS GOING TO PREVENT ONE INCIDENT FROM OCCURRING WITH THIS VIOLENCE ONLY TO BE INCARCERATED AND NO LONGER ABLE TO DEFEND ANY CHILD FROM ANY OTHER PREDATORS...SO THEN WHAT IS THE POINT...COULD HE NOT FIND SOME OTHER WAY OF PROTECTING THE CHILDREN OR WAS HE JUST HAVING A PSYCHOTIC EPISODE..REALLY
what is he thinking?