Did anyone in their mind believe that yoda and the emperor knew each other when they were young or were old enemies who had fought in the past as younger sith/jedi?

I always believed yoda and the emperor were close to the same age and were old foes. As it turns out the emperor is not an old man at all he is just force lightening fried to look old.

Other impressions I always had was that Luke was taken to dagobah when he was a kid before going to uncle owen. I remember reading in starlog that kurtz said luke was taken there immediately after him and lukes mom and leia were split up. This is why luke says the comment "there is something familiar about this place" Also that dagobah was the home planet of the sith. The scene where luke cuts off vaders head is inside what most call a cave and even some books call it a cave but it is really a temple. when luke looks inside the room where he sees vader you can see the outline of a concrete door. it is not a cave or tree. This is why it is strong with the dark side of the force. Also this is why yoda chose that planet to hide on. No one would think to look for a jedi oin the home world of the sith.