In the past few weeks Delhi has become the latest place in India convulsed with religious violence as Hindu mobs burned Muslim neighborhoods, mosques and killed over 40 people. The violence comes in the wake of a new citizenship law that excludes undocumented Muslims, but it also follows years of incendiary rhetoric and policies from the ascendant right-wing Hindu nationalist party, the BJP, and India's Prime Minister, Narendra Modi. As the political philosophy of Hindu nationalism gains ground in India we look back at one of its architects - Vinayak Savarkar.