Nichiren Daishonin states "Priest Chih-tu124 writes in his work Toshun: "Someone questioned
me, saying, 'While the Buddha was in the world, there were many who were
resentful and jealous of him. But now, in the years after his passing,
when we preach the Lotus Sutra, why are there so many who try to make
trouble for us?' I replied, 'It is said that good medicine tastes bitter.
This sutra, which is like good medicine, dispels attachments to the five
vehicles and establishes the one supreme teaching. It reproaches common
mortals and censures sages, denies Mahayana and refutes Hinayana. It
speaks of the heavenly devils as poisonous insects and calls the heretics
evil demons. It censures those who cling to Hinayana beliefs, calling them
mean and impoverished, and it dismisses bodhisattvas as beginners in
learning. For this reason, heavenly devils hate to listen to it, heretics
find their ears offended, persons in the shomon and engaku realms are
dumbfounded, and bodhisattvas flee in terror. That is why all these types
of persons try to make trouble for us. The Buddha was not speaking
nonsense when he predicted that we would face "much hatred and
jealously."'" From Kaimoku Sho (Opening of the Eyes part 1).
I'm not sure where you got the idea about intolerance though, us Nichiren Shoshu believers aren't intolerant at all

I'll dig out the stuff about Maitreya for you