Gladly.
Your quote that I claimed was misrepresenting Christian belief is as follows:
But we have a clear text whose entire subject is how "God's moral laws - the ceremonial law) is not at all in the same way as the Judaists do." So its context is perfect to resolve our dispute, Paul writes the following in Gal. 3:
"You foolish Galatians! Who has bewitched you? Before your very eyes Jesus Christ was clearly portrayed as crucified. 2 I would like to learn just one thing from you: Did you receive the Spirit by the works of the law, or by believing what you heard? 3 Are you so foolish? After beginning by means of the Spirit, are you now trying to finish by means of the flesh?[a] 4 Have you experienced so much in vain—if it really was in vain? 5 So again I ask, does God give you his Spirit and work miracles among you by the works of the law, or by your believing what you heard? 6 So also Abraham “believed God, and it was credited to him as righteousness.”[c]
7 Understand, then, that those who have faith are children of Abraham. 8 Scripture foresaw that God would justify the Gentiles by faith, and announced the gospel in advance to Abraham: “All nations will be blessed through you.”[d] 9 So those who rely on faith are blessed along with Abraham, the man of faith.
10 For all who rely on the works of the law are under a curse, as it is written: “Cursed is everyone who does not continue to do everything written in the Book of the Law.”[e] 11 Clearly no one who relies on the law is justified before God, because “the righteous will live by faith.”[f] 12 The law is not based on faith; on the contrary, it says, “The person who does these things will live by them.”[g] 13 Christ redeemed us from the curse of the law by becoming a curse for us, for it is written: “Cursed is everyone who is hung on a pole.”[h] 14 He redeemed us in order that the blessing given to Abraham might come to the Gentiles through Christ Jesus, so that by faith we might receive the promise of the Spirit.
Here we see the Law is associated with:
being under a curse
No one is justified by the law
"the converted Christian believer makes it his business to follow God's moral laws"
But Gal 3:24 says,
" So the law was our guardian until Christ came that we might be justified by faith. 25 Now that this faith has come, we are no longer under a guardian."
Sp the law just demonstrates to Jew that we can't be justified by keeping the law or being moral.
So " For if a law had been given that could impart life, then righteousness would certainly have come by the law."
Paul takes up this argument again in chapter 5 saying:
It is for freedom that Christ has set us free. Stand firm, then, and do not let yourselves be burdened again by a yoke of slavery.
2 Mark my words! I, Paul, tell you that if you let yourselves be circumcised, Christ will be of no value to you at all. 3 Again I declare to every man who lets himself be circumcised that he is obligated to obey the whole law. 4 You who are trying to be justified by the law have been alienated from Christ; you have fallen away from grace. 5 For through the Spirit we eagerly await by faith the righteousness for which we hope. 6 For in Christ Jesus neither circumcision nor uncircumcision has any value. The only thing that counts is faith expressing itself through love."
So he finishes by contrasting life by the spirit and life by obedience to God's moral commands.
"So I say, walk by the Spirit, and you will not gratify the desires of the flesh. 17 For the flesh desires what is contrary to the Spirit, and the Spirit what is contrary to the flesh. They are in conflict with each other, so that you are not to do whatever[c] you want. 18 But if you are led by the Spirit, you are not under the law.
Now we are to live life by the spirit which will produce:
"22 But the fruit of the Spirit is love, joy, peace, forbearance, kindness, goodness, faithfulness, 23 gentleness and self-control. Against such things there is no law. 24 Those who belong to Christ Jesus have crucified the flesh with its passions and desires. 25 Since we live by the Spirit, let us keep in step with the Spirit."
So we do produce good works. But they are of no value towards our salvation. And those works are a function of walking by the spirit not obedience to God's moral law.
These are significant differences.