While it is definitely a fact that Christ was crucified on a Roman cross, Peter was referring to what is said in the OT about the one who hangs on a tree being accursed. Christ hath redeemed us from the curse of the law, being made a curse for us: for it is written, Cursed is every one that hangeth on a tree:(Gal 3:13)
So Christ took the curse of the law, which is the curse of sin and death, on Himself in order to set us free from that curse. Also, a cross would in fact need timber from a tree in order to be constructed. So that was not completely inaccurate.
Amen
“And
if a man have committed a sin worthy of death, and he be to be put to death, and thou hang him on a tree: his body shall not remain all night upon the tree, but thou shalt in any wise bury him that day; (
for he that is hanged is accursed of God that thy land be not defiled, which the LORD thy God giveth thee for an inheritance.”
Deuteronomy 21:22-23 KJV
“Know ye not, brethren, (for I speak to them that know the law,) how that
the law hath dominion over a man as long as he liveth? …..Wherefore, my brethren,
ye also are become dead to the law by the body of Christ; that ye should be
married to another, even to him who is raised from the dead, that we should bring forth fruit unto God.
For when we were in the flesh, the
motions of sins, which were by the law, did work in our members to bring forth fruit unto death. But now we are delivered from the law, that being dead wherein we were held; that
we should serve in newness of spirit,
and not in the oldness of the letter.”
Romans 7:1, 4-6
If a person reads Moses law through and through when a sinner is executed by the people in the manner decalred whether stoning then to death for adultery or pre marital sex or burning them alive for witchcraft or heresy , hanging them , chopping off tier limbs ect once the punishment written on the law is dispersed to the sinner guilty of the sin , the law has no more commandment to the sinner.
once they are put to death they are left cursed waiting in thier sins for eternal judgement now but the law says nothing to the dead person about how to be redeemed from death for thier sin like the gospel is all about the law only tells them how to die for thier sin how to judge each other and condemn each other and accuse and witness against one another even at times exact executions upon others
It ends when the sinner dies for that sinner there’s nothing else it has to say it
leaves them in death but then Jesus arrives with the gospel Raising the dead
“Verily, verily, I say unto you,
He that heareth my word, and believeth on him that sent me, hath everlasting life, and shall not come into condemnation; but is passed from death unto life.”
John 5:24 KJV