This is your argument:
The gospel says that John was baptizing, as a sign of repentance.
Jesus came, and was baptized.
Therefore, Jesus was a sinner.
Then Jesus arrived from Galilee at the Jordan coming to John, to be baptized by him. 14But John tried to prevent Him, saying, “I have need to be baptized by You, and do You come to me?” 15But Jesus answering said to him, “Permit it at this time; for in this way it is fitting for us to fulfill all righteousness.” Then he permitted Him. 16After being baptized, Jesus came up immediately from the water; and behold, the heavens were opened, and he saw the Spirit of God descending as a dove and lighting on Him, 17and behold, a voice out of the heavens said, “This is My beloved Son, in whom I am well-pleased.”
Nothing in this passage indicates Jesus was in need of redemption.
The verse in Leviticus does say the offering brought by Mary and Joseph was a sin offering.
Leviticus 12:8
‘But if she cannot afford a lamb, then she shall take two turtledoves or two young pigeons, the one for a burnt offering and the other for a sin offering; and the priest shall make atonement for her, and she will be clean.’”
It IS?
Thanks for explaining!
This is Rome's argument:
Do what ever we tell you or you are
"One indeed is the universal Church of the faithful, outside which no one at all is saved, in which the priest himself is the sacrifice, Jesus Christ, whose body and blood are truly contained in the sacrament of the altar under the species of bread and wine; the bread (changed) into His body by the divine power of transubstantiation, and the wine into the blood, so that to accomplish the mystery of unity we ourselves receive from His (nature) what He Himself received from ours." — Pope Innocent III and Lateran Council IV (A.D. 1215)
Therefore, if anyone says that it is not by the institution of Christ the lord himself (that is to say, by divine law) that blessed Peter should have perpetual successors in the primacy over the whole Church; or that the Roman Pontiff is not the successor of blessed Peter in this primacy: let him be anathema. — Vatican 1, Ses. 4, Cp. 1