Romans 2:1(parsed) you have no excuse,
International Standard Bible Encyclopaedia
Justification:
jus-ti-fi-ka’-shun (tsedheq, verb tsadheq; Septuagint and New Testament dikaioma, dikaiosis, verb dikaioo, “justification” “to justify,” in a legal sense, the declaring just or righteous. In Biblical literature, dikaioun, without denying the real righteousness of a person, is used invariably or almost invariably in a declarative or forensic sense.
The important issue being addressed in Romans is that Jesus died because of our sins and after that was raised up as the source of our justification in the court of heaven where we can be declared righteous. In the legal sense it is both a declaration and forensic reality, meaning to deal with our body, alive in Christ rather than dead in our sins.
Psalm 51:4 Against you, you only, have I sinned and done what is evil in your sight, so that you may be justified in your words and blameless in your judgment.
The you in this verse is God alone in heaven. All sin, no matter what they might be, is against God, who provided the law in order that we might know what is sinful.
Romans 3:20 For by works of the law no human being will be justified in his sight, since through the law comes knowledge of sin.
Romans 7:14 For we know that the law is spiritual, but I am of the flesh, sold under sin.
If anyone does not believe the words of the law, they have no hope in the court of heaven.
Isaiah 5:24 Therefore, as the tongue of fire devours the stubble, and as dry grass sinks down in the flame, so their root will be as rottenness, and their blossom go up like dust; for they have rejected the law of the Lord of hosts, and have despised the word of the Holy One of Israel.
Just because man changes civic law in order to make sin legal, it does not justify mankind in God’s opinion. Final judgment comes to us all in the heavenly courts even though some refuse to acknowledge God’s right to judge us.
Romans 3:26 It was to show his righteousness at the present time, so that he might be just and the justifier of the one who has faith in Jesus.