While I share your sentiment of not putting too much trust in a single source, I find that particular story complete believable.
It is common display of power, to force everyone to have to accept a post facto explanation for something either directly or indirectly violent. The actual explanation doesn't have to make sense, it exists solely to project power. It's not too far from several contemporary political events.
I have personal experience with people who behave like this. These same behavioral patterns, this same sort of thinking / interpreting the world. The level of violence was different by degree, barely contained by law, by what is commonly accepted, and by visibility.
It so happens that in this case there was a long-time cocaine abuser and addict who I believe also might have
traumatic brain injury. Cocaine and traumatic brain injury have a severe impact on the inflammatory response in the central nervous system – increasing inflammation – which is also behavior-modifying, increasing aggression. Environmental stress also has a similar effect on the brain and behavior.
It’s easy to notice multiple examples of severe head injury in the story. Social and environmental stress is severe as well. (I don’t think cocaine is involved; I mention cocaine in the context because it’s something that’s available in our modern enviroment which causes brain inflammation, cognitive impairment, and violence. These effects are provided by other things in the story.)
In the story I also recognize the violent and “dream logic”-like elements from the onset of dementia. I’m sure that hardships such as these people live in will bring about dementia-like effects and alterations. Bodies wear out, and the brain is part of the body. It is not the fundamental nature of the brain to wear out in silence and grace.
These behaviors are all in our nature. All of them. It’s just a question of latent tendencies, of impairment, and what sort of survival mode is brought about by which sort of environment.
(There is science on the claims I make here. There are papers out on this. Google Scholar suggestions: neuroinflammation + aggression + cytokine, cocaine + tbi + cytokine, cocaine + neuronflammation. Interleukin-6 (IL-6) in particular is an interesting cytokine with profound roles.
There are also parallels with malignant narcissism and the lack of object constancy. “Lack of object constancy” is specific and almost technical. Haphazard take on that: Reasons for senseless actions are not necessarily derived from the grounded reality of memory. Rather, sometimes with humans the reasons for violence are on-the-fly ad-hoc justifications fully experienced as memories by the person, generated “live” by, say, fear and anger and the hunger for power and dominance.
My apologies for not supplying actual citations. I wish I had the oomph. I appeal to your curiosity.)
It is common display of power, to force everyone to have to accept a post facto explanation for something either directly or indirectly violent. The actual explanation doesn't have to make sense, it exists solely to project power. It's not too far from several contemporary political events.