ASGORE DIDNT HAVE TO KILL THE HUMANS, THE MONSTERS COULD HAVE JUST TAKEN CARE OF THE HUMANS UNTIL THEY HAD 7 SO THE HUMANS COULD BREAK THE BARRIER FOR THE MONSTERS SO ASGORE KILLING CHILDREN WAS UNNECESSARY. THE UNDERTALE NEVER SAYS THE HUMAN SOULS HAVE TO BE OF KIDS WHO DIED, JUST 7 HUMAN SOULS; ASGORE: