India was a Hindu country before Arab General Mohammed Bin Qasim invaded it in 732 and ruthlessly massacred tens of thousand Hindus. For the next thousand years Muslim invaders and kings continued the massacre of Hindus and Buddhists. It is estimated that about 80 -100 million were massacred in 100 years, and millions were enslaved and converted to islam. Here is what the Dutch scholar Conrad Elst wrote in "Negation in India (read it in library of faithfreedom.org)
I have pasted a few parts here:
"The American historian Will Durant summed it up like this:%u201D The Islamic conquest of India is probably the bloodiest story in history. It is a discouraging tale, for its evident moral is that civilization is a precious good, whose delicate complex of order and freedom, culture and peace, can at any moment be overthrown by barbarians invading from without or multiplying within."
Only off and on did this persecution have the intensity of genocide, but it was sustained much longer and spread out much wider geographically than the Nazi massacre. Whereas the Germans including most members of the Nazi party, were horrified at the Nazi crimes against humanity within a few years, the Muslims, for whom Gott mit uns (God with us) was not a slogan but a religious certainty, managed to keep a good conscience for centuries. We will encounter similarities as well as differences between Nazi and Islamic crimes against humanity, but the most striking difference is definitely the persistence with which Islamic persecutions have continued for 14 centuries. This is because it had more spines, a more powerful psychological grip on its adherents than Nazism.
The ideological foundation of the Islamic campaign was similar to the Nazi ideology. The Muslium invaders (as we can read in numerous documents which they left us, from the Quran and the Hadith onwards) distinguished between three kinds of people: first of all the Muslims, the Herrenvolk (master nation) to which Allah had promised the world; secondly the Jews and Christians, who could live on under Muslim rule but only as third-class citizens, just like the Slavic Untermenschen (inferior people) in Hitler's planned new order, thirdly the species to be eliminated, the real Pagans who had to disappear from the face of the earth, for example the Hindus, Buddhists, Sikhs & Jains.