That verse notably does not support either of your statements.
The way to be unified with the Son of God is by following his example of embodying God's character traits in obedience to the Torah, which is the way to be free from sin.
No, it Moses presented them with a choice between life and death, life and a blessing for obedience to the Torah or death and a curse for disobedience, and instructed to choose life!:
Deuteronomy 30:15-20 “See, I have set before you today life and good, death and evil. 16 If you obey the commandments of the Lord your God that I command you today, by loving the Lord your God, by walking in his ways, and by keeping his commandments and his statutes and his rules, then you shall live and multiply, and the Lord your God will bless you in the land that you are entering to take possession of it. 17 But if your heart turns away, and you will not hear, but are drawn away to worship other gods and serve them, 18 I declare to you today, that you shall surely perish. You shall not live long in the land that you are going over the Jordan to enter and possess. 19 I call heaven and earth to witness against you today, that I have set before you life and death, blessing and curse. Therefore choose life, that you and your offspring may live, 20 loving the Lordyour God, obeying his voice and holding fast to him, for he is your life and length of days, that you may dwell in the land that the Lord swore to your fathers, to Abraham, to Isaac, and to Jacob, to give them.”
It is contradictory to choose think that the way to choose life is by choosing God's Word made flesh and that the way to choose death is by following his example of embodying Gos's Word.
All have sinned an fallen short of the God, so we all fall short of sinless obedience. Repentance is not a license to sin, but its value does mean that we are not required to be sinless. Jesus fulfilled the Torah so that we would know how to correctly obey it, but he did not fulfill is so that we would not need to follow him. The reason why Jesus fulfilled the Torah by loving his neighbor is so that we would love one another as he loved us, but he did not love our neighbor for us so that we don't have to.
God has not commanded anything that is not in accordance with walking in the Spirit, but rather His character traits are the fruits of the Spirit and the purpose of the Torah is to teach us how to embody His character traits, which is why the Spirit has the role of leading us to obey it (Ezekiel 36:26-27). In Romans 8:4-7, Paul contrasted those who walk in the Spirit with those who have minds set on the flesh who are enemies of God who refuse to submit to the Torah. In Galatians 5:16-23, Paul contrasted the desires of the flesh with who desires of the Spirit and everything that he listed as works of the flesh that are against the Spirit are also against the Torah while all of the fruits of the Spirit are in accordance with it. The Son is the radiance of God's glory and the exact likeness of His character (Hebrews 1:3), which he embodied through his works by setting a sinless example for us to follow of how to walk in the Spirit/how to walk in obedience to the Torah.