What super natural elements?
How were the family connections meaningless?
Mythological elements to better describe it, the belief in the yellow king, the ritualistic rapes and murders, the crowns, the swirl pattern, masks, the scripture type language, those teepee thingies etc.
How were they meaningful? They lead to no breakthrough in the case, the whole connecting of those spoon fed dots achieved nothing, the break came from Marty putting green and green together from evidence that was always there in the first instance.