"A most pitiful performance" - Nichiren Daishonin

"It is like, for example, a mere commoner who goes about proclaiming that he is a king. There is nothing to stop him from declaring himself to be a king. But no matter how his tongue may delight in making such a declaration, he remains no more than a commoner, humble and despised in station.

Or it is like someone insisting that mere shards and rubble are in fact jewels. Simply declaring that stones and shards are jewels has never once turned stones into real jewels. And you are doing the same thing when you go on repeating the formula “This very body is the Buddha,” mere words that have no reality behind them, a most pitiful performance!" -- Nichiren

He was talking about the Zenmen but he might as well have been speaking about Soka Gakkai members who go about claiming, "we are all Buddhas, I am a Buddha."