Negationism in India - Concealing the Record of Islam is a book by Koenraad Elst published in 1992.
The book attempts to demonstrate that there exists a prohibition of criticism of Islam and a denial of its historic crimes against humanity that amounts to censorship, comparing it to Holocaust denial.
Elst claims that historians of the Aligarh school (e.g. Irfan Habib) or Indian Marxists (e.g. Romila Thapar) have resorted to history-rewriting: "Therefore, in 1982 the National Council of Educational Research and Training (NCERT) issued a directive for the rewriting of schoolbooks. Among other things, it stipulated that: "Characterization of the medieval period as a time of conflict between Hindus and Muslims is forbidden." Under Marxist pressure, negationism has become India's official policy."