Romans 2:1-4

Romans 2:1-4 NIV
¹ You, therefore, have no excuse, you who pass judgment on someone else, for at whatever point you judge another, you are condemning yourself, because you who pass judgment do the same things. ² Now we know that God’s judgment against those who do such things is based on truth. ³ So when you, a mere human being, pass judgment on them and yet do the same things, do you think you will escape God’s judgment? ⁴ Or do you show contempt for the riches of his kindness, forbearance and patience, not realizing that God’s kindness is intended to lead you to repentance?

Are you a hypocrite?  Do you do something and then cast judgement on someone else for the same offense?  Sometimes people feel offended that person continues to "get away" with (insert whatever sin here) for so long.  Verse 4 explains the purpose is to lead us to repentance.

Now what do we do if a brother is sinning?  Do we allow the sin to continue so as to not "pass judgement"?  NO! Vs 2 clearly states the God has already passed judgement on certain behaviors and those are clearly marked out in scripture.  Should you see a brother in sin you follow Matthew 7:4-5 NIV and then Matthew 18:15-17 NIV if there be a need to go that far.

No where is scripture does it tell us to judge the world or non Christians.  That is God's job.  We are to bring the gospel to the world and allow God's Word to change the world.

God Bless.