The Sin of Slandering the True Dharma in Nichiren's Thought by Dr. Jacqueline Stone [should be mandatory reading for every Nichiren believer]

http://www.princeton.edu/~jstone/Articles%20on%20the%20Lotus%20Sutra%20Tendai%20and%20Nichiren%20Buddhism/The%20Sin%20of%20Slandering%20the%20True%20Dharma%20in%20Nichiren's%20Thought%20(2012).pdf