"Another great advantage was that, for the first time in history, all the peoples of India, of all sects and denominations, were brought under the supremacy of the Brahmans. Till then they had claimed to be priest of the three higher castes only and did not presume to speak for the Sudras and other Indian peoples except to keep them at a safe distance. The Mohammedans called all the non-Muslims inhabitants, without any discrimination, by the common name "Hindu", which practically meant non-Muslims and nothing more. This simple fact contributed to the unification of India more than any other single event, but also, at the same time, condemned the dumb millions of the country to perpetual subjection to their priestly exploiters. Indians became "Hindus," their religion became Hinduism and Brahmans their masters.
"The word Hindu itself is a foreign one. The Hindus never used it in any Sanskrit writing, that is those which were written before the Mohammedan invasion." [p. 22, An Essay on Hinduism, by Kelkar]