...are they who failed to pursue their studies thoroughly.
"But among the renowned masters of the time there were some who declared the True Word teachings to be superior, others who favored the T’ien-t’ai teachings, some who held the two teachings to be equal in value, and some who asserted they were alike in terms of principle but different in practice. None, however, could produce clear passages of scripture to support their contentions. Whichever teaching they favored, they were speaking out of mere conjecture."
Likewise, SGI members who denigrate us or our (Nichiren's) teachings fail to speak with Sutra and Gosho in hand.