They want to keep harrassing, humilitating, and persecuting people because the alternative is to accept that all humans are indeed equal which means their claim to superiority and pure-veg purity is & has been just b.s . It also means they and their casteist friends and their casteist families and their casteist ancestors are sadistic bastards without a shred of humanity.
The Nazis implemented their Ubermensch-untermensch discrimination for only 12 years, India's oppresor uppercastes perfected it thousands of years back. Christianity & Islam fucked up their systemised sadistic game by introducing the idea of equality, educating the oppressed, and offering them a way out of the oppressive Hindu caste system.