In 1330 the country was invaded by the Mongols who indulged in arson, rape and murder throughout the Valley (of Kashmir). The king and the Brahmans fled away but among the inhabitants who remained… Muslim ways of life were gradually adopted by the people as the only alternative…

Notes from Wikiquote

Quoted from Indian muslims: Who Are They, p. 91 & Growth of Muslim population in medieval India, A.D. 1000-1800, p.160; by K. S. Lal