You totally misunderstand the word eternity and eternal...Yahweh is translated as the lord ..the eternal. There is no pit called hell.
We arecnot the children and the decendents of the of those two as Adam and Eve are not the progenitors of humanity...they are the founders of one particular line. And the Israelites Jews seem themselves as direct decendents of that line.

If original sin existed in the first place it only concerns them not us

They were removed from Gan eden as the aliens were frightened they would learn how to extend their lives. A guard was put on the only exit ....so much for an all seeing all knowing God

It was only in the Gan Eden's that technology gave long lives to those who lived there