It might seem that the answer to this question is a resounding NO. Clearly, the Lord will judge all of our actions, even to the point of every idle word.
“For we must all appear before the judgment seat of Christ, that each one may receive the things done in the body, according to what he has done, whether good or bad.” (II Cor. 5:10)
“But I say to you that for every idle word men may speak, they will give account of it in the day of judgment.” (Matt. 12:36)
It is very helpful to note the tense of the action in these verses. It is future. So, yes, God will judge every sin in the day of judgment. Those that accept Christ’s sacrifice for their sins will not receive the punishment they deserve, but those who refuse His payment will pay themselves eternally in hell.
But it is correct to say that God temporarily overlooks sin. “Truly, these times of ignorance God overlooked, but now commands all men everywhere to repent, because He has appointed a day on which He will judge the world in righteousness by the Man whom He has ordained.” (Acts 17:30-31a) He is longsuffering and merciful, and not willing that any should perish. (Lam. 3:22-23; II Pet. 3:9) We see this when Jesus ministered to the woman taken in adultery. He said to her, Go and sin no more. (John 8:11) He was focusing on her sin nature as opposed to an individual sin.
So, in conclusion, how should we respond to the sins of others? Should we point out every sin in others and “nail them to the wall” each time? Yes, sin does need to be dealt with, but Proverbs 19:11 states “The discretion of a man makes him slow to anger, and his glory is to overlook a transgression”. God has used this verse in a powerful way in my life. Regretfully, I have spent much time focusing on the faults of others and being irritated or angry about those faults, all the while neglecting to be merciful and to notice what they are doing that is right. One godly man phrased it this way: “Overlook a transgression and praise”. This is truly a paradigm shift for us! Paul begins the book of I Corinthians with amazing praise and thankfulness for the Corinthians, despite their many sins. So in our dealings with others, including our family members, may we show mercy. Jesus commanded, “Therefore be merciful, just as your Father also is merciful.”(Luke 6:26)