Indian Country Etiquette
We are proud of our teachings, and our heritage. They have been passed to us by our ancestors, and represent thousands of years of our individual histories. Your patience and understanding of our traditions and cultures is appreciated.
With regards to, "However, spiritual teachings, sacred ceremonies and burial grounds, are not openly shared with the public." This may be a response to the crowds, but Stephenie never has a sacred ceremony or burial ground scene in her books. The one episode of "teachings" has to do with the wolf pack and those who know of it, exclusively. Even other members of the tribe who aren't aware of the wolf history aren't there. Only those who know about the boys and their transformations are allowed. Stephenie never published a scene where Bella was watching a tribal ceremony. They were sacred, and she did not go there.
Sounds to me like the tribe is gently chastising Meyer (and her followers). Meyer did what Reese has warned us against many times: (mis)appropriating Native legends.
For more on the subject, see Quileute Werewolves in Twilight.
Below: "I'm proud of my Indian heritage too! Awooooo!"