my take is, this type of human interaction will NEVER cease because there is something intrinsically wrong with the human species, either genetically, spiritually or all of the above. The evil that humans perpetrate is just overwhelming sometimes. This need for power and extreme control over others. I just don't fathom it.
If you are surrounded by senseless killing and other atrocities long enough, life, anyone's life, becomes as cheep as wadding up a piece of news paper. There is no reflection of one's humanness, no ability to see a personality or perceived pain as cause and effect, no remorse. It's mass sociopathic behaviour. Life is dull and empty and expendable.