Actually, Sher Shah was a Buxariya Pathan from Bihar. He was born in the town Sasaram. His original name was Farid-ud-din Abul Muzaffar. His mother belonged to the Qaimkhani Rajput clan from northern Rajasthan. So can’t see how you can call him an Afghan.
The point being made, and applies equaly to both countries, is we play up the contribution of our respective communities, at the expense of the other community. You have just made his point by denying Zafar Khan’s Indianess.