Makiguchi admits that the Soka Gakkai is engaged in the fault of "mixing

“Soka Kyoiku-gakkai is unique in that it is a combination of the Buddhism of Nichiren Daishonin and my own philosophy of values. By becoming a Nichiren Shoshu priest I would be unable to teach anything except the doctrine of their faith, therefore I will not enter this sect.” (Showa Tokko Dan Atsu Shi — History of Oppression by the Secret Police in Showa Period, Part IV.)

This proves that they can never know the great favors of Shakyamuni Buddha and Nichiren Daishonin.