Hey brother,
We do disagree. It is good to look at our disagreements (not trying to change your mind but explore our views).
I agree wholeheartedly. That is how we are going to find the resolve to the disputes.
As far as changing minds, that is up to God, and I leave it in His hands, lol. We cannot change minds. As one of my Pastors has said, "If I can change your mind, someone can come right behind me and—change it back!" lol
1 Peter 3:18 KJV
For Christ also hath once suffered for sins, the just for the unjust, that he might bring us to God, being put to death in the flesh, but quickened by the Spirit
I absolutely agree with this verse. Christ died for us - the Just for the unjust. He bore our sins bodily.
So how is that not visiting the punishment we owed to Christ?
He vicariously bore our sins that we might not die.
One thing I would throw in here is that we need to keep the context of the Covenant of Law as it was given: the penalty for death under the Law was a physical death literally. We see a physical death of the animal as opposed to the physical death of the sinner, hence a vicarious death.
We also see physical death in this Age: Christians that sin to a point that God decides is worthy of physical death—die.
Ananias and Sapphira are examples, as are the Corinthian believers who were partaking of Communion unworthily.
Physical death in Old Testament times should not be equated to "spiritual" or eternal death (separation from God), but should remain in the context it was given. It is true that it is likely those who died physically under the Law will suffer eternal separation, but that doesn't negate the judgment these people will face.
Some reject the notion that these sacrifices actually provided remission of sins, but that is just a fact:
Leviticus 4:13-21 King James Version
13 And if the whole congregation of Israel sin through ignorance, and the thing be hid from the eyes of the assembly, and they have done somewhat against any of the commandments of the Lord concerning things which should not be done, and are guilty;
14 When the sin, which they have sinned against it, is known, then the congregation shall offer a young bullock for the sin, and bring him before the tabernacle of the congregation.
15 And the elders of the congregation shall lay their hands upon the head of the bullock before the Lord: and the bullock shall be killed before the Lord.
16 And the priest that is anointed shall bring of the bullock's blood to the tabernacle of the congregation:
17 And the priest shall dip his finger in some of the blood, and sprinkle it seven times before the Lord, even before the vail.
18 And he shall put some of the blood upon the horns of the altar which is before the Lord, that is in the tabernacle of the congregation, and shall pour out all the blood at the bottom of the altar of the burnt offering, which is at the door of the tabernacle of the congregation.
19 And he shall take all his fat from him, and burn it upon the altar.
20 And he shall do with the bullock as he did with the bullock for a sin offering, so shall he do with this: and the priest shall make an atonement for them, and it shall be forgiven them.
21 And he shall carry forth the bullock without the camp, and burn him as he burned the first bullock: it is a sin offering for the congregation.
So the basic principle of the Doctrine of Christ seen here (Hebrews 6:1) is physical in nature, and has a temporal context. It is the figure of the true, and meant only as a temporary means of remission.
This is why the Writer of Hebrews contrasts the Old with New. Old sacrifice, old Priesthood, old remission.
Hebrews 13:11-12 King James Version
11 For the bodies of those beasts, whose blood is brought into the sanctuary by the high priest for sin, are burned without the camp.
12 Wherefore Jesus also, that he might sanctify the people with his own blood, suffered without the gate.
I disagree that this means God punished Christ instead of punishing us.
I'm not sure I would view both statements to be the same. I see where a distinction could be made between the concept of Christ dying in the stead of the sinner, and "God punishing Christ instead of us."
In the former, we recognize that it is Christ that laid His life down willingly, no man took it from Him. He did this to take upon Himself the penalty for our sin. That is a vicarious death.
In the latter, we still have God Himself taking that penalty upon Himself, so I wouldn't state it as God punishing Christ with our sin.
It still remains that this general concept is seen in His death. Death is a penalty for sin, a punishment, and Christ took our punishment for us. God will punish those who reject His vicarious death, so the corollary would (or could be viewed as) our punishment was placed on Him, and in that sense it is the punishment for sin received by Christ, and can only be inflicted upon men by God (Matthew 10:28).
So I see two different issues in the two statements, both of which would need to be addressed separately, in my view.
Continued...