We are told to obey the Lord. I'm not disputing that.
Romans 2:7-15
7To those who by persistence in doing good seek glory, honor and immortality, he will give eternal life. 8But for those who are self-seeking and who reject the truth and follow evil, there will be wrath and anger. 9There will be trouble and distress for every human being who does evil: first for the Jew, then for the Gentile; 10but glory, honor and peace for everyone who does good: first for the Jew, then for the Gentile. 11For God does not show favoritism.
12All who sin apart from the law will also perish apart from the law, and all who sin under the law will be judged by the law. 13For it is not those who hear the law who are righteous in God's sight, but it is those who obey the law who will be declared righteous. 14(Indeed, when Gentiles, who do not have the law, do by nature things required by the law, they are a law for themselves, even though they do not have the law, 15since they show that the requirements of the law are written on their hearts, their consciences also bearing witness, and their thoughts now accusing, now even defending them).
The Laws were more than the 10 Commandments. Circumcision was a practiced by the Jews but not the Gentiles. It was part of the law but not felt to be necessary for the Gentiles to practice in order to become Christians:
Romans 2:17-29
17Now you, if you call yourself a Jew; if you rely on the law and brag about your relationship to God; 18if you know his will and approve of what is superior because you are instructed by the law; 19if you are convinced that you are a guide for the blind, a light for those who are in the dark, 20an instructor of the foolish, a teacher of infants, because you have in the law the embodiment of knowledge and truth-- 21you, then, who teach others, do you not teach yourself? You who preach against stealing, do you steal? 22You who say that people should not commit adultery, do you commit adultery? You who abhor idols, do you rob temples? 23You who brag about the law, do you dishonor God by breaking the law? 24As it is written: "God's name is blasphemed among the Gentiles because of you."
25Circumcision has value if you observe the law, but if you break the law, you have become as though you had not been circumcised. 26If those who are not circumcised keep the law's requirements, will they not be regarded as though they were circumcised? 27The one who is not circumcised physically and yet obeys the law will condemn you who, even though you have the written code and circumcision, are a lawbreaker.
28A man is not a Jew if he is only one outwardly, nor is circumcision merely outward and physical. 29No, a man is a Jew if he is one inwardly; and circumcision is circumcision of the heart, by the Spirit, not by the written code. Such a man's praise is not from men, but from God.
There was a problems, perhaps even a jealousy, between the Jews and the Gentiles. The crux of the argument was whether the Gentiles needed to follow the law of the Hebrew/of Moses in order to be saved. Again, circumcision was a large part of this. Were the Jews more righteous than the Gentiles because they were circumcized?
Romans 2:1-8
1What advantage, then, is there in being a Jew, or what value is there in circumcision? 2Much in every way! First of all, they have been entrusted with the very words of God.
3What if some did not have faith? Will their lack of faith nullify God's faithfulness? 4Not at all! Let God be true, and every man a liar. As it is written:
"So that you may be proved right when you speak
and prevail when you judge."
5But if our unrighteousness brings out God's righteousness more clearly, what shall we say? That God is unjust in bringing his wrath on us? (I am using a human argument.) 6Certainly not! If that were so, how could God judge the world? 7Someone might argue, "If my falsehood enhances God's truthfulness and so increases his glory, why am I still condemned as a sinner?" 8Why not say--as we are being slanderously reported as saying and as some claim that we say--"Let us do evil that good may result"? Their condemnation is deserved.
Paul answers that no-one is righteous in God's sight by observing the law. We simply aren't capable. At the same time, he points out that the purpose of the law is to make us aware of of "conscious of" our sin/s.
Romans 2:9-19
9What shall we conclude then? Are we any better ? Not at all! We have already made the charge that Jews and Gentiles alike are all under sin. 10As it is written:
"There is no one righteous, not even one;
11there is no one who understands,
no one who seeks God.
12All have turned away,
they have together become worthless;
there is no one who does good,
not even one."
13"Their throats are open graves;
their tongues practice deceit."
"The poison of vipers is on their lips."
14"Their mouths are full of cursing and bitterness."
15"Their feet are swift to shed blood;
16ruin and misery mark their ways,
17and the way of peace they do not know."
18"There is no fear of God before their eyes."
19Now we know that whatever the law says, it says to those who are under the law, so that every mouth may be silenced and the whole world held accountable to God. 20Therefore no one will be declared righteous in his sight by observing the law; rather, through the law we become conscious of sin.
Though we are incapable of being righteous on our own because of our sin (verse 23), we can be made righteous through our faith Christ-- who lived a life without sin, (verse 22). Must the Gentiles live by the law to be saved. (Remember that this is going back to the debate of circumcision). The answer is in verse 28. No. Man is justified by faith apart from observing the law. Does this mean that the law no longer has any meaning? Ofcourse not, it has a purpose. It shows us our sin and how much more we are in need of Christ's grace, (verses 24 & 31).
Romans 2:21-31
21But now a righteousness from God, apart from law, has been made known, to which the Law and the Prophets testify. 22This righteousness from God comes through faith in Jesus Christ to all who believe. There is no difference, 23for all have sinned and fall short of the glory of God, 24and are justified freely by his grace through the redemption that came by Christ Jesus. 25God presented him as a sacrifice of atonement, through faith in his blood. He did this to demonstrate his justice, because in his forbearance he had left the sins committed beforehand unpunished-- 26he did it to demonstrate his justice at the present time, so as to be just and the one who justifies those who have faith in Jesus.
27Where, then, is boasting? It is excluded. On what principle? On that of observing the law? No, but on that of faith. 28For we maintain that a man is justified by faith apart from observing the law. 29Is God the God of Jews only? Is he not the God of Gentiles too? Yes, of Gentiles too, 30since there is only one God, who will justify the circumcised by faith and the uncircumcised through that same faith. 31Do we, then, nullify the law by this faith? Not at all! Rather, we uphold the law.