Willing murderers

What kind of people are willing to undertake such dreadful business as murdering innocent women and children?

People who dont have strong mental health or are insane, or those who feel that commiting such acts puts them in conctrol of their lives.

What kind of society produces such callous killers?

one that does not teach people to value life enough or one that oppresses people and puts them in a corner where that is there only option.