It is a well known psyche trait.
Either of peoples as a whole or a person in a particular situation.
Remembered memories of re-membered memories of brutality are internalized and then externalized.
Also as one climbs up a hierarchy social class or caste one acquires the ways and means of the higher animal. Both good and bad. But especially what gets them to the top of the pile-on!
If today's traumatized Jews of the holocaust brutalize the poor Palestinians or a Mayawati has a birthday bash that has these babes and brainless bimbos drooling at what SHE HAS USURPED their panache for partying- then that is part of the plot!
Only a huge psyche overhaul can make a brutalized past tender with loving kindness and maybe mellowing with time. . .
But all that is part of the course. . .
COURSE FOR THE TRASHPOT TITILLATION TUREEN perhaps. . .