The Golden Rule is obsolete. Jesus superceded it with a New Commandment. The New Commandment is to love others as Christ loved us. The ultimate measure of Jesus’ love for us is the cross. Any time Christians treat each other with similarly supreme, sacrificial love, it witnesses to the world.
By contrast, if what the world sees is people engaging in relentless arguments, they have no reason to imagine that being a Christian is anything special. It doesn’t take a spiritual transformation to create an argumentative person; the unredeemed world churns them out at a dime a dozen.
Nope. He merely added to what was already there, because no disciples like these had ever before existewd.
The New Commandment is to love others as Christ loved us.
Not just any others This commandment only deals with the relationships between truly new-born disciples, members of His genuine churches. This kind of love cannot be exercised between unsaved spiritually dead worldlings or between a hybrid pair one of whom is regenerated and the other not. I hope you are willing to seek counsel on this opinion of yours.
I would offer that we can love one another as Christ loves while at the same time defend the truth from those who misunderstand or pervert it. We are warned to, "Accept anyone who is weak in faith, but not for the purpose of arguing over differences of opinion." (Romans 14:1). When the issue, however, is over what is doctrinally true from Scripture, we are commanded to earnestly contend for it. There is a reason for that. Even Jesus did so.
Regardless, you can substitute this for do unto others... and the point remains that sound doctrine is a necessity in orde to love others as Christ loved us. Which He did in giving us doctrine, and dying for us according to doctrine because we violated doctrine.
Make your argument against Pharisaical letter-correctness versus obeying the intent of doctrine but do not oppose doctrine by saying above all we must love others as Christ loved us, which is doctrine.
By contrast, if what the world sees is people engaging in relentless arguments, they have no reason to imagine that being a Christian is anything special. It doesn’t take a spiritual transformation to create an argumentative person; the unredeemed world churns them out at a dime a dozen.
If you were arguing about simply engaging in relentless arguments then wee would have no argument, but that is not what I saw you expressing, but as opposing contentions about doctrine in general, to be forsaken for showing love, which is a false dichotomy, not taught by Scripture.
What is needed is worship of God in spirit and in Truth, and love for others according "which is according to Godliness." (1 Timothy 6:3)
And as love for God means love for His Truth, and for others, then they which keeps souls from Biblical conversion and worship and service according to Scripture must be opposed, and sound doctrine promoted, in word and in deed. Which is what Scripture charges preachers with.
If thou put the brethren in remembrance of these things, thou shalt be a good minister of Jesus Christ, nourished up in the words of faith and of good doctrine, whereunto thou hast attained. (1 Timothy 4:6)