Ambedkar announced his impending departure from Hinduism at the speech’s close

Evidence

I am sorry, I will not be with you. I have decided to change. This is not the place for giving reasons. But even when I am gone out of your fold, I will watch your movement with active sympathy, and you will have my assistance for what it may be worth. Yours is a national cause. Caste is no doubt primarily the breath of the Hindus. But the Hindus have fouled the air all over, and everybody is infected—Sikh, Muslim and Christian. You, therefore, deserve the support of all those who are suffering from this infection—Sikh, Muslim and Christian. — Ambedkar, B R, Annihilation of Caste_ The Annotated…, 1026

Categorization

• XREF: This foreshadows his actual conversion to Buddhism in 1956 — the announced ‘change’ that came 19 years later.