In most cases it is the Buddha’s own disciples who will destroy this Buddhist Law

"Because they fail to understand this principle, scholars of the Tendai school, looking at the interpretation that takes the earlier sutras and the Lotus Sutra to be in some respects alike in nature and forgetting the other interpretation that takes them to be completely unlike one another, in the end allow their thinking as members of the Tendai school to fall into views characteristic of the Flower Garland school. And because they fall into views characteristic of the Flower Garland school, they regress even further by embracing the perfect teaching of the Correct and Equal sutras and the Wisdom sutras. Eventually they reach the point where their views do not differ from those of Shan-tao and his like, and in the end they are the same as that slanderer of the Law, Hōnen. As the sutra says, it is worms from the body of the lion itself that will devour the lion.

The second volume of the Benevolent Kings Sutra states: “Great King, after I have passed into extinction, the four types of Buddhist disciples in the ages to come, the rulers, crown princes, and other princes of the various small countries, those persons who should uphold and guard the three treasures of Buddhism, will on the contrary become the destroyers of the three treasures, just as it is the worms that are born from the body of a dead lion that will feed on the lion’s flesh. It will not be the non-Buddhists but in most cases the Buddha’s own disciples who will destroy this Buddhist Law of mine and thereby commit a very grave offense.”

In the case of the Soka Gakkai, these disciples of the Buddha have adopted the Shingon practice of Yuiga Yoga and the Zen principle of a Patriarchal Transmission of the Law. For this reason, they are destroying the Law ofr Namu Myoho renge kyo." - Regarding the Attainment of Buddhahood by Persons of the True Vehicles