The Hindus received something that would destroy their glorious age of philosophy, growth in math and early science, it was called Islam!
You know another great Empire of knowledge and wisdom was decimated around 1200s according to Islamic and Hindu tradition, some estimate 80 Million Hindus were eradicated in the Indus River Region during India's great expansion of knowledge. You want to talk about invasions, the old traditions brag of pulverzing the Hindus into dust! Ibn Warraq's book "Why I am not a Muslim" comes to grip with a believer who can't understand why his religion allows no self-examination, no reviews of Quran textual critiscm and the fear and paranoia that someone is going to report you for not being a good Muslim. The Salmund Rushdie Affair propelled his scholarship and changed him from a believer to a atheists, he could not understand how a God or Allah was so cruel.
http://en.wikipedia.org/wiki/Muslim_conquests_on_the_Indian_subcontinent
Ibn Warraq's book was a tough book for me to plough through, if you think the Bible has problems with "textual variance" Warraq make's the claim the "entire book of the Prophet" and Traditions are totally suspect and unreliable because the Rulers and Religious Leaders were fighting against each other using the Quran and Hadiths to hold their status. The turmoil and power shifts did no justice to the Prophet's Words and his original thoughts are probably long gone because of the ever changing alterations to control the masses and keep the powerful people in place. If anyone has any desire to understand Islam from the point of view of a real scholar and do not mind he is atheists, his writings are very good with intense source materials from the oldest records accessable.
"He is the author of nine books, including Why I Am Not a Muslim (1995), The Origins of the Koran (1998), The Quest for the Historical Muhammad (2000), What the Koran Really Says: Language, Text and Commentary (2002), Defending the West: A Critique of Edward Said's Orientalism (2007), Which Koran?: Variants, Manuscripts, and the Influence of Pre-Islamic Poetry (2008), Why the West is Best: A Muslim Apostate's Defense of Liberal Democracy (2011) and Sir Walter Scott's Crusades & Other Fantasies (2013). He addressed the United Nations "Victims of Jihad" conference organized by the International Humanist and Ethical Union, alongside such speakers as Bat Ye'or, Ayaan Hirsi Ali, and Simon Deng. [15]
Who destroyed the Hindu Culture that was thrieving?
" An estimate of the number of people killed remains unknown. Based on the Muslim chronicles and demographic calculations, an estimate was done by K.S. Lal in his book Growth of Muslim Population in Medieval India, who claimed that between 1000 CE and 1500 CE, the population of Hindus decreased by 80 million. Although this estimate was disputed by Simon Digby in (School of Oriental and African Studies), Digby suggested that estimate lacks accurate data in pre-census times. In particular the records kept by al-Utbi, Mahmud al-Ghazni's secretary, in the Tarikh-i-Yamini document several episodes of bloody military campaigns. [3] Hindus who converted to Islam however were not completely immune to persecution due to the caste system among Muslims in India established by Ziauddin al-Barani in the Fatawa-i Jahandari, [4] where they were regarded as an "Ajlaf" caste and subjected to discrimination by the "Ashraf" castes. [5]"