"Here I may add an interesting footnote to the sociological history of modern Muslim India and Pakistan. Almost every Muslim of any importance claimed, and still claims today, in his autobiography reminiscences, memoirs, journal and bio data, that his ancestors had come from Yemen, Hejaz, Central Asia, Iran, Ghazni, or some other foreign territory. In most cases, this is a false claim for its arithmetic reduces the hordes of local converts (to Islam) to an insignificant number. Actually, it is an aftermath and confirmation of Afghan and Mughal exclusiveness. It is also a declaration of disaffiliation from the soil on which the shammers have lived for centuries, and to which in all probability, they have belonged since history began. If all the Siddiquis, Qureshis, Faruqis, ... have foreign origins and their forefathers accompanied the invading armies, or followed them, what happens to the solemn averment that Islam spread peacefully in India? Are we expected to believe that local converts, whose number must have been formidable, were all nincompoops and the wretched of the earth—incapable over long centuries of producing any leaders, thinkers, or scholars?”"
January 1, 1970
https://en.wikiquote.org/wiki/Islam_in_Pakistan