Most of the facts about one of the biggest holocaust have never been collected and/or verified. But few organisations and individuals have been working to collect and present these facts to the modern world to ensure that such cruelity never happens again. Here are the links I could get:
Indeed, the Muslim policy vis a vis India seems to have been a conscious
and systematic destruction of everything that was beautiful, holy, refined.
Entire cities were burnt down and their populations massacred. Each successive
campaign brought hundreds of thousands of victims and similar numbers were
deported as slaves. Every new invader often made literally his hill of
Hindu skulls. Thus the conquest of Afghanistan in the year 1000, was followed
by the annihilation of the entire Hindu population there; indeed, the region
is still called Hindu Kush, 'Hindu slaughter'. The Bahmani sultans in central
India, made it a rule to kill 100.000 Hindus a year. In 1399, Teimur killed
100.000 Hindus in a single day, and many more on other occasions.