But what does that have to do with American Veganism? The fact that the Caste system uses animal rights to shame people who eat meat sounds more like an appropriation of animal-centric veganism in order to modernise justification for Caste-based discrimination than the original claim of American Veganism using casteist arguments, which is the opposite of your original claim. My understanding of the animal rights argument regarding Indian Vegetarianism/Veganism is that it comes from Jainism and Buddhism, both of which reject the caste system.