It is economic disparity that creates violence. Only when villas are in reach of a small poor town do you start to get petty muggings, scams and murders.
I am not claiming that people from other castes behaved badly, in contrary, but when you see how little those people have (ie 3 generations, or 10 members of family sleeping in 1 room 3x3m and that was their whole 'house' - just 4 super basic walls with no roof, nothing else). Coming back to my relatively crappy eastern european country where people constantly complain how poor they are compared to ie germany made me feel sad, ashamed and badly out of touch with my folks...
I remember hearing about this in a Jordan Peterson video. The correlation between economic inequality and young make violence is apparently one of the strongest in all of sociology, and still applies regardless of the size of the geographical boundary you draw.