The native people of South Asia so-called the untouchables has been mistreated by the Vedic Aryans since their invasion, occupation and settlement in South Asia. The caste based society where your caste determines your life is the most inhumane system developed to keep the Vedic Aryan elite ruling over rest of South Asian for thousand of years. The Dalits converted to Islam, Christianity and Buddhism to escape caste discrimination and now Brahman elites created benefits only for Hindu Dalits to pull back some non-Hindus back into slavery by offering government benefits.
