Vibhasa, another 2nd century text, states that Pushyamitra burned Buddhist scriptures, killed Buddhist monks, and destroyed 500 monasteries in and ar… - Pushyamitra Shunga

The oft-repeated allegation that Pushyamitra Sunga offered a reward for the heads of Buddhist monks is a miraculous fable related exclusively in a hostile source and contradicted by the finding of art historians that Pushyamitra was a generous patron of Buddhist institutions.

Even a very general knowledge of Indian history already shows that any instances of Hindu persecution of Buddhism could never have been more than marginal. After fully seventeen centuries of Buddhism's existence, from the 6 th century BC to the late 12 th century AD, most of it under the rule of Hindu kings, we find Buddhist establishments flourishing all over India. Under king Pushyamitra Shunga, often falsely labelled as a persecutor of Buddhism, important Buddhist centres such as the Sanchi stupa were built. As late as the early 12 th century, the Buddhist monastery Dharmachakrajina Vihara at Sarnath was built under the patronage of queen Kumaradevi, wife of Govindachandra, the Hindu king of Kanauj in whose reign the contentious Rama temple in Ayodhya was built. This may be contrasted with the ruined state of Buddhism in countries like Afghanistan or Uzbekistan after one thousand or even one hundred years of Muslim rule. Indeed, the Muslim chroniclers themselves have described in gleeful detail how they destroyed Buddhism root and branch in the entire Gangetic plain in just a few years after Mohammed Ghori's victory in the second battle of Tarain in 1192. The famous university of Nalanda with its fabulous library burned for weeks. Its inmates were put to the sword except for those who managed to flee. The latter spread the word to other Indian regions where Buddhist monks packed up and left in anticipation of further Muslim conquests. It is apparent that this way, some abandoned Buddhist establishments were taken over by Hindus; but that is an entirely different matter from the forcible occupation or destruction of Buddhist institutions by the foreign invaders.

After Ashoka's lavish sponsorship of Buddhism, it is perfectly possible that Buddhist institutions fell on slightly harder times under the Sungas, but persecution is quite another matter. The famous historian of Buddhism Etienne Lamotte has observed: "To judge from the documents, Pushyamitra must be acquitted through lack of proof."...The only reason to sustain the suspicion against Pushyamitra, once it has been levelled, is that "where there is smoke, there must be fire" - but that piece of received wisdom is presupposed in every act of slander as well.