As I said, that is part of the judicial law given to ancient Israel as a nation, why would I follow that?
If by "Christian" you just mean some novel definition of the word that you made up right now to not include Paul's writings as part of the scripture, then yes.
Fun fact... when is the term Christian first applied in the Bible? Answer... to the followers at Antioch, in Acts 11:26, the same verse which describes how Paul came to stay with those same people.
And so by your use of that verse, you just condemned Paul, Matthew, John, the rest of the disciples, and called Jesus a sinner.
If you read on even two verses from the one you quoted, you would see that Paul was condemning the double standards of those he was writing to:
"And thinkest thou this, O man, that judgest them which do such things, and doest the same, that thou shalt escape the judgment of God?" (Romans 2:3)
And if you read further into the chapter, you would see that this double standard was being used by Gentiles, who thought they had not sinned because only Jews were under the law:
"For as many as have sinned without law shall also perish without law: and as many as have sinned in the law shall be judged by the law" (Romans 2:12)
And so what Paul said is actually that we are all judged by the same law, whether Jew or Gentile, and not that we should never take any sort of judgment or stance on moral issues whatsoever (for those who try to do that with Romans 2:1 and Matthew 7:1 with the judge not lest ye be judged thing, they are are of course, ironically, passing judgment on you for judging people).
And his message can be reconciled with various other verses, such as:
"Do ye not know that the saints shall judge the world? and if the world shall be judged by you, are ye unworthy to judge the smallest matters? Know ye not that we shall judge angels? how much more things that pertain to this life? If then ye have judgments of things pertaining to this life, set them to judge who are least esteemed in the church." (1 Corinthians 6:2-4)
Which liberal Christians apparently disagree with.
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