Not to belabor a point, but even if they consider themselves Christian, there’s a big difference between having different interpretations of the same book and having a whole ass other previously non-existent book that becomes part of the religious canon. Off the top of my head, I can’t think of any sects of Protestant Christianity that have a whole ass other book. They have wildly different interpretations of the same book, but that is fundamentally different than having a new prophet and gospel.
Not to belabor a point, but even if they consider themselves Christian, there’s a big difference between having different interpretations of the same book and having a whole ass other previously non-existent book that becomes part of the religious canon. Off the top of my head, I can’t think of any sects of Protestant Christianity that have a whole ass other book. They have wildly different interpretations of the same book, but that is fundamentally different than having a new prophet and gospel.