Yes we hear Buddhists slain Muslims nowdays. But Islam firstly got into India by Islamic merchants. Ofcourse later there have been some wars between Indians and Muslims.
Oh Yeah -
HOW CONVERSION TOOK PLACE IN INDIA?
In Muhammad bin Qasim’s first successful foray into India, as recorded by al-Biladuri and Muhammad al-Kufi (in Chachnama): at Debal, ‘the temples were demolished, a general massacre endured for three days; prisoners were taken captive;’ at Nairun, ‘the idols were broken, and mosques founded despite its voluntary surrender;’ at Rawar and Askalanda, ‘all the men in arms were put to the sword, and the women and children carried away captive;’ at Multan, ‘all men capable of bearing arms were massacred; six thousand ministers of the temple were made captive, besides all the women and children.’ (141. Eliot HM and Dawson J, The History of India As Told by the Historians, Low Price Publications, New Delhi, Vol. I, p. 469)
In Sultan Mahmud’s conquest of Kanauj, ‘ the inhabitants either accepted Islam or took up arms against him to become the food of Islamic swords,’ records his secretary Abu Nasr al-Utbi.(Ibid, p. 26) In the captured of Baran, records al-Utbi, ‘since God’s sword was drawn from the scabbard, and the whip of punishment was uplifted… ten thousand men proclaimed their anxiety for conversion and their rejection of idols.’(Ibid, p. 42–43)
After conquering a city, Sultan Mahmud—an educated cultured man and a master of Islamic jurisprudence (fiqh)—would normally slaughter the men of fighting age, enslave their women and children and force the remaining inhabitants to embrace Islam.
The words of famous Islamic scholar and historian, Alberuni, on the exploits of Sultan Mahmud’s repeated invasions of India, will suffice to summarize what the Muslim conquerors had brought upon the conquered peoples. Alberuni (973–1050), an outstanding Persian scholar, was captured by Sultan Mahmud during his conquest of the Central Asian state of Khwarizm in 1017. Mahmud brought him to his capital Ghazni and appointed as an official in his court. Mahmud brought Alberuni to India in the course of his invasions. He traveled across India for twenty years and studied Indian philosophy, mathematics, geography and religion from Hindu pundits. He wrote of the Muslim conquest of India: ‘Mahmud utterly ruined the prosperity of the country and performed there wonderful exploits, by which the Hindus became like atoms of dust scattered in all direction, and like a tale ofold in the mouth of the people. Their scattered remains cherish, of course, the most inveterate aversion toward all Muslims.’(150. Sachau EC (2002) Alberuni’s India, Rupa & Co., New Delhi, p. 5–6 (first print 1888)
Amir Timur or Tamerlane, on his campaign to India—undertaken for fulfilling his obligation of waging holy war against the infidels—slaughtered 100,000 captives in a single day in Delhi in December 1399. (143. Lal KS (1999) Theory and Practice of Muslim State in India, Aditya Prakashan, New Delhi, p. 18)
When Muhammad bin Qasim began the conquest of Sindh, he exercised the policy of converting the people of a territory, which gave a fight, at the pain of death. He gave quarters to the people, if they submitted to his invading army without giving a fight. He did not force them to convert. When the report of his latter lenient policy reached his patron Hajjaj in Baghdad, disapproving the leniency, he wrote to Qasim:
‘…I learnt that the ways and rules you follow are conformable to the (Islamic) Law. Except that you give protection to all, great and small alike, and make no difference between enemy and friend. God says, ‘Give no quarter to Infidels, but cut their throats.’ Then know that this is the command of the great god. You should not be too ready to grant protection… After this, give no protection to any enemy except to those who are of rank (i.e., accept Islam). This is a worthy resolve, and want of dignity will not be imputed to you.’( Elliot & Dawson, Vol. I, p. 173–74)
Having received this command from Hajjaj, Qasim followed it through in his next conquest of Brahmanabad, sparing none who did not embrace Islam. According to al-Biladuri, ‘eight, or some say twenty-six thousand, men were put to the sword.’ (Ibid, Vol. I, p. 122) However, putting the great multitude of Hindus, who often refused to embrace Islam, to death was difficult. Instead, giving them quarters for raising taxes was a more lucrative alternative. Qasim later wrote to Hajjaj in this regard. In response, Hajjaj wrote back:
‘The letter of my dear nephew Muhammad Kasim has been received and the fact understood. It appears that the chief inhabitants of Brahmanabad had petitioned to be allowed to repair the temple of Budh and pursue their religion. As they have made submission, and agreed to pay taxes to the Khalifa, nothing can be properly required from them. They have been taken under our protection (dhimmi), and we cannot in any way stretch out our hands upon their lives or property.’ (Sharma, p. 109)
Hindus were, thus, accepted as dhimmi subjects, which spared them from conversion by the sword. The Godless Umayyad rulers were more interested in filling the treasury by extracting higher taxes from non Muslim subjects than converting them to Islam. For example, al-Hajjaj harshly treated those, who converted to Islam.(Bulliet RW (1979) Conversion to Islam and the Emergence of a Muslim Society in Iran, N. Levtzion ed., Conversion to Islam, Holmes and Meier Publishers Inc., New York, p. 33) When a group of non-Muslims came to him to inform their acceptance of Islam, al-Hajjaj refused to recognize their conversion and ordered his troops to return them to their villages.(Pipes (1983), p. 52)
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Islamic Jihad: A Legacy of Forced Conversion, Imperialism and Slavery