Q1: What kind of people are willing to undertake such dreadful business as murdering innocent women and children?

I personally think that the kind of people who are able to understand such a task as murdering any innocent people are the kind of people who have been damaged in the past. I believe that most people who can do that has grown up in a challenged family. I think that they may also be very desperate for an income and or uneducated and cannot be hired for a job that provides a sufficient income.

Q2: What kind of society produces such callous killers?

I believe that it is less the society that produces these kinds of killers and more the personal family situation I mentioned before. I think possibly the society can be a factor, and that a society that is less educated, safe and wealthy will more likely produce people able to murder innocent women and children.