From BBC Future Online: Why some people are cruel to others (...)
From article: Inflicting harm or pain on someone incapable of doing the same to you might seem intolerably cruel, but it happens more than you might think.
Why are some humans cruel to people who dont pose a threat to them sometimes even their own children? Where does this behaviour come from and what purpose does it serve? Ruth, 45, London.
Humans are the glory and the scum of the universe, concluded the French philosopher, Blaise Pascal, in 1658. Little has changed. We love and we loathe. We help and we harm. We reach out a hand and we stick in the knife.
We understand if someone lashes out in retaliation or self-defence. But when someone harms the harmless, we ask: How could you?
much more at link:
https://www.bbc.com/future/article/20201016-why-some-people-are-cruel-to-others
The good news is that the percentage of humans who are sadists or psychopaths is
fairly low. The bad news is that it only takes one of them to ruin my/your/our day!