Nandigram according to me is a bigger riot as it was fomented by the state of west bengal against its people. The state wanted to forcibly grab the land of farmers and handover to Tata. Poor farmers were not getting right price. Here a rich killed a poor. A goon killed an innocent. Whereas, in Godhra, 50 hindu were burnt alive by a mob of fanatic muslims. The place was Godhra, place which had the goodwill of housing ISI agents and fomenting communist riots. After killing of 50 hindus, problem started after 40 hours as such fanatics were to teach lesson. Whatever, Narender Modi did was fully justified. Why muslims living in gujarat and godhra didn't come out and name people who killed 50 hindus. It was their fault and therefore they have to pay and they paid.
This a true state-sponsored killing and its parellel in history is the riot of 1984 riot when congress three muskeeters killed 1800 innocent sikhs.