Here's the passage:
Does this mean that we should never discuss interpretations of the law? Does this mean that differing interpretations of the law should never cause Christian brothers to separate from one another? I will show that both answers are "no." What does Paul mean, then?
Divisions in the early church
Paul was in a difficult position as an early church leader. Most of the early converts to Christianity were Jews. Their entire worldview was shaped by a group of Biblical laws which we'll call "Jew/Gentile separation laws." These included circumcision requirements, prohibitions on intermarriage, food laws, ritual "cleanness" laws, and some others. These laws had an important purpose in Israelite history, which was to prevent God's people from syncretizing (mixing culturally/religiously) with the surrounding Gentile nations. God made this purpose clear in the law; for example: