Destroying caste requires denying shastra authority outright, as Buddha and Nanak did.

Evidence

You must not only discard the shastras, you must deny their authority, as did Buddha and Nanak. You must have courage to tell the Hindus that what is wrong with them is their religion—the religion which has produced in them this notion of the sacredness of caste. Will you show that courage? — Ambedkar, B R, Annihilation of Caste_ The Annotated…, 954

Categorization

• XREF: Ambedkar locates Buddha and Nanak as precedents for outright religious rejection—relevant to the reader’s interest in how caste annihilation was conceived and implemented. — connects to: Nationalist propaganda depicts Christian conversion as ritual desecration of the Buddha.