It ultimately will not end up well for the Saudi royals.
Saudi royals have offed each other ever since there have been Saudi royals. They are all very similar too as first-cousin marriages in that country are the norm.
The royal family has congenital heart problems because of it.
You can also know them by their eyes. With EVERY king, one eye is looking north and the other one looks east, then west, then who knows. THAT is another VERY visual sign of first-cousin marriages.