Why did God allowed Israel to plunder and kill men women and children and take virgins for themselves in their conquest of the promised land?

The Canaanite nations were deemed deserving of annialation by G-d not unlike Sodom and Gemmorah. Israel became the arm of the lord, virgins considered untainted were not deserving of death. NO SIR !! CHILDREN ARE MORE UNTAINTED THAN WOMEN !! HOW COULD INNOCENT HELPLESS CHILDREN DESERVE DEATH AND A YOUNG WOMEN FULL OF MENSTRUATION AND UNCLEANNESS BECAUSE OF LACK OF SACRIFICES FOR HER MENSTRUATION NOT ?!! NO SIR !! YOU ARE CRAZY !! I DARE YOU TO TRY TO PROVE YOUR ANSWER - JUST TRY - YOU FOOL !!