and lower caste were lumped together in the category of "Hindus". While higher-caste Indians regarded lower castes to be impure, they were now regarded as belonging to a similar category, which partly explains the belief among many higher caste Indians "Hinduism in the last one thousand years has been through the most severe persecution that any religion in the world has ever undergone." Thapar further notes that "The need to exaggerate the persecution at the hands of the Muslim is required to justify the inculcation of anti-Muslim sentiments among the Hindus of today." Hindutva-allies have even framed the Muslim violence against Hindu expressions of faith as a "Hindu Holocaust". Romila Thapar states that the belief in a severe persecution in the last millennium brushes away the "various expressions of religious persecution in India prior to the coming of the Muslims and particularly between the Śaiva and the Buddhist and Jaina sects". She questions what persecution means, and if it means religious conversions, she doubts that conversions can be interpreted as forms of persecution. According to Thapar, it is quite correct to mention that Muslim iconoclasts destroyed temples and the broke images of Hindus but it should also be mentioned that Muslim rulers made donations to Hindu sects during their rule. David Lorenzen asserts that during the Islamic rule period there was state-sponsored persecution against Hindus, yet it was sporadic and directed mostly at Hindu religious monuments. According to Deepa Ollapally, the Mughal emperor Aurangzeb was clearly discriminatory towards Hindu and all other non-Muslims, displaying an "unprecedented level of religious bigotry", but perhaps this was a consequence of the opposition he faced from a number of his family members. During the medieval span, she states, "episodes of direct religious persecution of Hindus were rare", as were communal riots between Hindus and Muslims. Destruction of religious architecture According to André Wink, the mutilation and destruction of Hindu religious idols and temples were an attack on Hindu religious practice, and the Muslim destruction of religious architecture was a means to eradicate the vestiges of Hindu religious symbols. Muslim texts of this period justify it based on their contempt and abhorence for idols and idolators in Islamic thought. Peter Jackson notes that the Muslim historians of the medieval era viewed the creation and expansion of Islamic Sultanates in Hindustan as "holy war" and a religious conquest, characterizing Muslim forces as "the army of Islam"