Is there really such a thing as “Original Sin”?
Unification perspective is that Jesus attained only level of Paradise and not Heaven. That’s not the way Christians understand it. They also have the view that Jesus’ teaching and accomplishment is limited, whereas salvation through the True Parents and being connected to them through Blessing has the potential of complete salvation, dependent upon fulfilling your own course, and responsibility.
But the salvation from True Parents depends on, or hinges upon the doctrine of “original sin” and “lineage”. Without original sin, or false lineage then the whole theology falls apart and there is no justification for the Moon family to stand in a higher position and central position of original True Parents over everyone else.
Original Sin is invisible, intangible, a matter of blind belief. It takes a metaphoric story of Adam, Eve, and the Archangel and a Principle version of the fall to serve as a foundation for the belief in a True Parent. If you ask a Jew he would say that there is only God. A Muslim also would say that there is only God. Why do you need any family in a central position over everyone else?
The only qualification for Moon to be in that position is his own theology, his life of suffering, that he says is his qualification to be in that position, and his theology that he was born without original sin and distinct from everyone else, through a process of conditions of indemnity based upon Jewish stories of maintaining the lineage in the Hebrew bible.
To any follower of Moon he is the origin, the starting point of a new world, the original Adam and his wife is the original Eve. Others may have varying perspectives on that. Members excuse the behavior of the True Family members even though it may be unprincipled and resemble the fallen world. The theology makes them the origin of God’s original ideal. So they can continue to sin - but it’s okay because they are in the position of True Family. If so, then they are making their own version of the Divine Principle - the very thing they accuse Satan of doing. You can’t have it both ways - you can’t be original and fallen. You can’t be in the realm of the Principle and still interact with Satan. You can’t teach that the ideal of God is the Family Four Position Foundation and yet commit adultery, or live with another woman as your concubine.