I'm reading the book Ho'opono - The Hawaiian Way to Put Things Back into Balance - by Pali Jae Lee, and might post a review once finished, but there is a one thing that catched my attention.

Pali Jae Lee was (still is?) a member of Huna Research, and speaker on their conferences, and I felt she is held in high respect in Huna community. She was a librarian (with Bishop Museum among others).

She claims to have done research in Brigham's daily journal (she was a librarian), where he wrote about a lot of tiny details and was meticulous about keeping it, but there is no mention of meeting with MFL anywhere. She unfolds a theory that MFL was "lying" knowingly (that his use of terms like aumakua, unihipili etc. was corrected by prof. Beckley, but MFL responded by saying that his audience would not know the difference).

Some of the controversial claims in the book are:

Huna has little or nothing of anything Hawaiian in it.

No one really is anymore (a kahuna).

While I tend to agree with the first opinion (that MFL fabricated the story about Brigham, and perhaps several other facts), I'm not sure whether I can agree with the other claims.
What do I know....really nothing, but all I was able to read and hear so far from those who seem to know, doesn't indicate to me that either of the two claims are fully valid.
Perhaps, it would depend on agreeing upon a common ground about what really Huna is and consists of, and who really a Kahuna is.