"But now the 4,589,659 people of this country of Japan have been deceived by the great heavenly devil in the person of men such as Shan-tao, Eshin, Yōkan, and Hōnen, who have led them to cast aside Shakyamuni and take Amida Buddha as their object of devotion. And in their madness, they have gone so far as to seize the fifteenth day of the second month [the day when Shakyamuni passed away] and declare it to be the day of Amida Buddha’s passing; and the eighth day of the fourth month [when Shakyamuni was born] they claim to be the birthday of Medicine Master Buddha. Their hatred of Shakyamuni, who is the father of us all, is so intense that they insist that Great Bodhisattva Hachiman is a manifestation of Amida Buddha. In doing so, they mean to pay honor to Great Bodhisattva Hachiman, but in fact they become enemies of Great Bodhisattva Hachiman.
If I understood nothing of all this, that would be the end of the matter. But in fact for the past twenty-eight years I have endeavored to dispel these mistaken beliefs by quoting the passage [from the Lotus Sutra in which Shakyamuni Buddha states]: “But now this threefold world [is all my domain, and the living beings in it are all my children].” If people failed to believe me, they could at least have left it at that. But instead they shot arrows at me, slashed me, attempted to kill me, exiled me, or drove me away. For that reason Great Bodhisattva Hachiman has set fire to his dwelling and ascended to the heavens." 
The SGI and the Nichiren Shoshu also hate Shakyamuni Buddha. They destroy the great matter of Nichiren's declaration of Shakyamuni Buddha as Original Eternal Buddha and the very reason for the persecutions befalling him.