More on the forceful practices from the Opening of the Eyes

"Answer: The Nirvana Sutra says: “If even a good monk sees someone destroying the teaching and disregards him, failing to reproach him, to oust him, or to punish him for his offense, then you should realize that that monk is betraying the Buddha’s teaching. But if he ousts the destroyer of the Law, reproaches him, or punishes him, then he is my disciple and a true voice-hearer.”

Chang-an comments on this as follows: “One who destroys or brings confusion to the Buddha’s teachings is betraying them. If one befriends another person but lacks the mercy to correct him, one is in fact his enemy. But one who reprimands and corrects an offender is a voice-hearer who defends the Buddha’s teachings, a true disciple of the Buddha. One who rids the offender of evil is acting as his parent. Those who reproach offenders are disciples of the Buddha. But those who do not oust offenders are betraying the Buddha’s teachings.”

and earlier in the same writing:

"If we examine the “Treasure Tower” chapter of the Lotus Sutra, we find Shakyamuni Buddha, Many Treasures Buddha, and the Buddhas of the ten directions who are emanations of Shakyamuni Buddha gathering together. And why? As the sutra itself says, “Each . . . has come to this place on purpose to make certain the Law will long endure.” Shakyamuni, Many Treasures, and the other Buddhas intend to insure the future propagation of the Lotus Sutra so that it can be made available to all the children of the Buddha in times to come. We may surmise from this that their concern and compassion are even greater than those of a father and mother who see their only child inflicted with great suffering. Hōnen, however, shows not the least concern about their compassion, but would tightly shut the gates to the Lotus Sutra in the Latter Day of the Law so that no one would have access to it. Like a person who tricks a demented child into throwing away a treasure, he tries to induce people to discard the Lotus Sutra, a shameless thing to do indeed!

If someone is about to kill your father and mother, shouldn’t you try to warn them? If a bad son who is insane with drink is threatening to kill his father and mother, shouldn’t you try to stop him? If some evil person is about to set fire to the temples and pagodas, shouldn’t you try to stop him? If your only child is gravely ill, shouldn’t you try to cure him or her with moxibustion treatment? To fail to do so is to act like those people who see but do not try to put a stop to the Zen and Nembutsu followers in Japan. [As Chang-an says,] “If one befriends another person but lacks the mercy to correct him, one is in fact his enemy.”

By the principle, "the closer the the teaching is to the truth without being the truth, the more dangerous the teaching", SGI, Nichiren Shoshu, and Nichiren Shu are for more dangerous than Nembutsu, Zen, Shingon and Theravada (Hinayana).