As though by habit, Narendra Modi is once again in the thick of controversy. To his many detractors, the 59-year-old chief minister of the prosperous Western state of Gujarat was finally brought one step closer to justice when he appeared Saturday night before a federal team investigating his alleged complicity in anti-Muslim riots that swept the state eight years ago. To his equally numerous admirers, Mr. Modi once again set himself a higher standard of behavior than the average Indian politician. He answered questions for over five hours without fuss, and said little to the press except to affirm his faith in the constitution...