Definitely possible I'm missing something, and it's a touchy subject, but one I'm increasingly interested in these times. So feel free to correct if I'm wrong, or just chime in.
Along side this, there’s actual physical violence between other caste groups. The ones targeting Brahmins is interesting because of the language used (example above) and how normative it has become (Tamil mainstream media will not call it out, pop culture acceptance and tropes), their complete lack of political power in the state and the absence of much physical violence. There’s some very fascinating history behind this. In case you are interested in how the current moment came about, two books:
1. The Emergence of Provincial Politics, DA Washbrook - https://www.amazon.com/Emergence-Provincial-Politics-Preside...
2. The politics of south India, CJ Baker - https://www.amazon.com/Politics-South-1920-1937-Cambridge-St...
Caste, class, and ethnicity, are not tightly-defined concepts (with the exception of caste in India, I'm referring to extensions of the idea outside of its origin), the genocide of the Tutsi has aspects of all three.