Where is your Biblical proof for Mary not having original sin?
Mary is the new Eve, she is the Ark of the Covenant. Do you really think that God, The Almighty, the Holy of Holies, the Great I Am, would allow Himself to be born of a sinful woman? Do you not see the folly in this type of thinking?
Even His commandments were placed in a golden ark made to the Lord’s specifications. The Son of God could only be conceived in someone pure and sinless.