Islamic conquest emancipated Shudras from Brahmin domination through equal religious inclusion.

Evidence

The Muslims, destroying the carved stone images of the cunning Arya Bhats, forcibly enslaved them and brought the Shudras and Ati-Shudras in great numbers out of their clutches and made them Muslims, including them in the Muslim Religion. Not only this, but they established inter-dining and intermarriage with them and gave them all equal rights. They made them all as happy as themselves and forced the Arya Bhats to see all this. — Ambedkar, B R, Annihilation of Caste_ The Annotated…, 142

Categorization

• XREF: Connects to the broad literature on Islam in India as an egalitarian force vs. caste — the familiar Ambedkarian historical counterfactual that mass Shudra conversion to Islam eroded the caste order.