Let at least the children life... and suffer to become more Doffys who will bring more suffering to the world, more wars, more death, more profit for the criminals and rulers of the underworld
Which way Oda:
Kill all CD included the children (commiting genocide like them showing that CDs and the regular people are not different)
Let the children life and bear the grudges for the fall of there culture creating more "Doffys"
Either way a peacful world will never achieved; just more wars and conflict to fill the power vacuum left by the WG