Paul also said
1 Corinthians 5:12 What business is it of mine to judge those outside the church? Are you not to judge those inside
That's no reason to disobey scripture
2 Corinthians 5:18-20 All this is from God, who reconciled us to himself through Christ and gave us the ministry of reconciliation: [19] that God was reconciling the world to himself in Christ, not counting people's sins against them. And he has committed to us the message of reconciliation. [20] We are therefore Christ's ambassadors, as though God were making his appeal through us. We implore you on Christ's behalf: Be reconciled to God.
This ministry is for all Disciples of Jesus, not just preachers, but AT LEAST preachers should preach this.
I understand this may seem polite and accepting. But it comes with a side of apathy. Not sharing with someone something that could save them when they're in error, is a lack of love, and contrary to the call of scripture.
John 12:47-50 “If anyone hears my words but does not keep them, I do not judge that person. For I did not come to judge the world, but to save the world. [48] There is a judge for the one who rejects me and does not accept my words; the very words I have spoken will condemn them at the last day. [49] For I did not speak on my own, but the Father who sent me commanded me to say all that I have spoken. [50] I know that his command leads to eternal life. So whatever I say is just what the Father has told me to say.”
Galatians 1:6-9 I am astonished that you are so quickly deserting the one who called you to live in the grace of Christ and are turning to a different gospel--- [7] which is really no gospel at all. Evidently some people are throwing you into confusion and are trying to pervert the gospel of Christ. [8] But even if we or an angel from heaven should preach a gospel other than the one we preached to you, let them be under God's curse!
GalatIan's 3:1 You foolish Galatians! Who has bewitched you? Before your very eyes Jesus Christ was clearly portrayed as crucified.
Galatians 5:7-12 You were running a good race. Who cut in on you to keep you from obeying the truth? [8] That kind of persuasion does not come from the one who calls you. [9] “A little yeast works through the whole batch of dough.” [10] I am confident in the Lord that you will take no other view. The one who is throwing you into confusion, whoever that may be, will have to pay the penalty. [11] Brothers and sisters, if I am still preaching circumcision, why am I still being persecuted? In that case the offense of the cross has been abolished. [12] As for those agitators, I wish they would go the whole way and emasculate themselves!
2 Timothy 4:1-5 In the presence of God and of Christ Jesus, who will judge the living and the dead, and in view of his appearing and his kingdom, I give you this charge: [2] Preach the word; be prepared in season and out of season; correct, rebuke and encourage---with great patience and careful instruction. [3] For the time will come when people will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear. [4] They will turn their ears away from the truth and turn aside to myths. [5] But you, keep your head in all situations, endure hardship, do the work of an evangelist, discharge all the duties of your ministry.
Acts 19:1-5 While Apollos was at Corinth, Paul took the road through the interior and arrived at Ephesus. There he found some disciples [2] and asked them, “Did you receive the Holy Spirit when you believed?”
They answered, “No, we have not even heard that there is a Holy Spirit.” [3] So Paul asked, “Then what baptism did you receive?” “John's baptism,” they replied. [4] Paul said, “John's baptism was a baptism of repentance. He told the people to believe in the one coming after him, that is, in Jesus.” [5] On hearing this, they were baptized in the name of the Lord Jesus.
Somebody is going to be wrong, and just leaving them to their fate without sharing the truth with them (out of love and pure motives) is just wrong! By the time they're standing in front of the judgment seat, it's too late.
This is not to say that some aren't misguided, self righteous, and sanctimonious. That needs to be addressed as well, but not by disobeying scripture and by stopping to preach about salvation. That's throwing out the baby with the bathwater.