Mahmud of Ghazni
"Mahmud utterly ruined the prosperity of the country, by which the Hindus became like atoms of dust scattered in all directions, and like a tale of old in the mouth of the people." Alberuni's India, p.22.
An interesting incident during the Battle of Haldighati. Akbar sent Raja Man Singh and Asaf Khan against Rana Pratap of Mewar in 1576. There were Rajput soldiers (Hindu) on both sides; those under Rana Pratap were fighting the ones under Raja Man Singh. At one stage in the fierce struggle, Badaoni asked Asaf Khan how he could distinguish between the friendly and the enemy Rajputs. Asaf Khan replied: "Shoot at whomsoever you like, on whichever side they may be killed, it will be a gain to Islam."
Smith, Akbar the Great Mogul, pp.108-109.
Lal, Studies in Medieval Indian History, pp.171-172.