Thinking about it (from the movies, not books), only Han, Leia and their group know that Luke is a Jedi. Any other Rebel may not have witnessed any Jedi moments with Luke. In fact, Luke may have been considered just a prisoner of war or a deserter during the Battle of Endor. He surrenders to Vader and somehow returns for the Victory Celebration. Not one Rebel saw what happened in between that time. That would be an interesting take on things.