Because they are of their father and he was a liar and a murderer from the beginning.
Psychopathy is a virtue to an entity that lies to itself.
The irony is that this inversion means phrases such as tikkum olam (heal the world) and "never again"., translate to destroy the world and most definitely again, but for real this time. They create their own worst nightmare.
If jews really wanted tikkun olam they would start with themselves and it's easy. If you have been cut, sue your parents and the rabbi and the synagogue. Make this the norm and after a generation or two of not mutilating babies genitals there may be some improvement in the levels of psychopathy among jews.
shalom