Somehow I am of the impression that your mind on the subject were to change if non-white writers were writing novels that had scenes describing how -in western european cultures- it was normal for fathers to introduce their daughters into womanhood through arcane, fire-lit rituals.  yes, it is imagination, but I would hit the roof if it was inferred in a work of fiction that it was normal for British, French, Dutch etc to engage in such acts with their own children as part of a "coming-of-age" ceremony, and I was of one of those cultures.

But it is exactly this kind of thing that white writers do when writing about ancient non-white cultures from the world over.  People read these novels and the majority feel that the authors have done enough research to make such scenes sound realistic.  One need look no further than Lynn Beyak to see how settlers demand that the stories they want to hear should be written, rather than the actual reality.