I would guess they diverted out of: - respect for the dead: a person has just passed on. Many people want at least the illusion of deceased people being at re

I would guess they diverted out of: - respect for the dead: a person has just passed on. Many people want at least the illusion of deceased people being at rest, and would think it's undignified to bring the body all the way to the destination when it could be allowed to be taken off and "rest". and - the comfort of surrounding passengers: there's not a lot of free space on a passenger plane. I don't know if there are any procedures for moving a body to someplace more convenient to the other passengers, but doing so would kind of fly in the face of the previous point.