Hi again
@Athée, it is nice to have an opportunity to chat with you again! I hope you will be finding through this that God's ways are higher than our ways.. because justice requires all things to be considered.. which a human in his limited perspective is ill-equipped, and in his corrupted way of thinking is unable to do impartially.
This law of execution for capital offence was given to a holy people, so as to maintain the purity of their culture. As it happened though, they did introduce corruption and then fell away entirely (read about King Manasseh), and it is because they were exiled among Babylon that they did in fact lose their authentic knowledge of The Holy One. When they reformed the nation, they did so using their best human efforts (their understanding/reasoning/mind - see Proverbs 3:5), creating a highly restrictive system so as to reduce the opportunity of transgressing God's law - yet they had lost sight of the way such as Jesus called them hypocrites, that while they claim to keep the law, they are in fact breaking it (eg, Mark 7:13, Matthew 23:28). Same thing happens on a huge scale among those calling themselves Christian today. They need to be born again, because they just don't have the life in them (Matthew 6:23, 2 Peter 2:2).
At that time, John the Baptist came along with a message of repentance (an authority he proclaimed based upon his relationship with God and the righteousness as given by Him instead of man's honour system (Matthew 3:7) - (consider Romans 6:16c, Romans 3:21-22, John 5:44, John 4:23).
As a result, the religious leaders ("blind Pharisee's", "brood of vipers", "whitewashed tombs") had become so enslaved and blinded by their beliefs that it caused them to reject and take the position of opposition (pride/envy) to the actual truth that Jesus spoke. In the end, they were so enslaved and trapped in their fallen state of mind that they reasoned it was better to release Barabbas and condemn Jesus (Matthew 27:18).
So you will see that written law is still able to be misused by those who do not apply it with the same spirit which it is written. (1 John 3:14, 2 Corinthians 3:6, John 1:4).
In that way, the nation of Israel declared it's total desolation through the act of condemning the most innocent, and the kingdom was taken away from them, to be given to a new nation (Matthew 21:33-46, Daniel 7:13-14,21-22).
We know that Christianity is now overrun with gentiles that have no knowledge of Torah, they have good intentions, but they do not truly reflect the holy society that Moses established. Therefore, these are times like no other and Torah is much more difficult to apply justly, because justice demands that a person is not only found to have acted contrary to the law, but also guilty of doing wrong so as to disobey (consider Romans 5:13, James 4:17).
This is the meaning of such scriptures as "there is none righteous, for all have fallen short of the glory of God". The Jews fell short of it by opposing Jesus, and the gentiles were ignorant of it, having chosen to believe doctrines that do not lead them toward it (2 Timothy 4:3, 1 Timothy 4:1-2).
These are those dark days that Jesus spoke of in John 12:35 after the light coming into the world had been violently rejected - those now walking in darkness do not know where they are going. St. Paul writes in Romans 8 that creation was subjected to futility, hoping for the glorious coming day - the revealing of the sons of God. This interstitial period is a time of grace, a charitable final offer for repentance, as it is written in Hebrews 10:26-31 that there is no more sacrifice remaining - anyone who keeps sinning after knowing the truth does disrespect toward the blood of the son of God.
Now you can consider the event where Jesus says "he who is without sin cast the first stone". This doesn't mean to say "he who has never sinned", it means to say "he who determines that it is holy justice to put her to death, let him cast the first stone". Imagine this picture. Some were full of wrath, bitterness and judgement. They are
acting of sin. They had to depart because their conscience condemned them in Jesus' presence. The ones who were present and acting of noble virtue, for genuine care of protecting the robustness of righteous society .. what would they have thought? They surely knew that Jesus was the most righteous amongst them and that He had already advocated in her defence .. wouldn't they have been consumed by the indignation of His words if they thought they should act to condemn her? So we can see that Jesus knew there was something not quite just about condemning this one. He told her to leave her life of sin, so it shows that He had already observed the required repentance in her heart. She must have been pretty shaken up by all this - having received conviction by being brought so close to judgement.
In these days, Jesus has "bound the strong man" Matthew 12:29, Ephesians 4:8, receiving all authority to judge from another place (Luke 19:12, John 18:36, Matthew 28:18, Romans 2:5, Matthew 26:52) and setting Himself up as the everlasting High Priest of the new covenant (Hebrews 7:23-25).
.. So, even if heaven and earth shall pass away, His word will never pass away, and that is an inescapable fact. For example: Luke 6:37, Matthew 7:21-23, John 14:6, Psalms 139:8.