I found this article to be thought provoking. And I think it applies Romany societies throughout the world which feel justified committing horrific criminal acts against perceived enemies. The USA experienced it in Vietnam. They say it has been an issue throughout the former Yugoslavia. Germany to some degree still experinces it. And all those secretive regimes throughout the world, such as Russia, china, N Koea, etc, also no doubt experience it. Otherwise healthy societies are traumatized and morally disfigured through concerted acts of evil against innocent people.

* So many, not Romany

Nerf, you seem to miss the main point the article is making. It is not just the individuals committing the atrocities who suffer, but rather the society as a whole faces extreme trauma and moral debasement. Look at deep lasting trauma the USA went through in Vietnam as more and more of the atrocities became known to the world. It is only as that generation grows old and dies off that the horror begins to fade.