Christophe Jaffrelot states that modern Hindu nationalism was born in Maharashtra, in the 1920s, as a reaction to the Islamic Khilafat Movement wherein Indian Muslims championed and took the cause of the Turkish Ottoman sultan as the Caliph of all Muslims, at the end of the World War I. Hindus viewed this development as one of divided loyalties of Indian Muslim population, of pan-Islamic hegemony, and questioned whether Indian Muslims were a part of an inclusive anti-colonial Indian nationalism. The Hindu nationalism ideology that emerged, states Jeffrelot, was codified by Savarkar while he was a political prisoner of the British colonial empire.