B) God & Man's Sin
Perhaps you have met such a Christian or you yourself even have such false notions. The way God deals with His people and those who are not His people are quite different.
God, Judgment and the Unbeliever
Unbelievers will perish in their sin. They will be fully judged for all their wrong doings. Esau serves as a case example for this (Genesis 36).
God, Judgment and the Believer
Believers, however, are a different case. Yahweh deals with them quite differently. God "begins with us first." Judgment begins with the household of God (cf. 1 Peter 4:17). Jacob serves as a clear example of this (Genesis 37 starts his genealogy).
A Christian is not judged in regards to salvation, or whether he is accepted by God as His child. Justification by faith teaches us His children are saved by faith in Christ. Every believer is on the path of sanctification.
God says that He scourges every child of His. This is a mark of belonging that we might be holy like our Father (cf. Hebrews 12:6).
In Deuteronomy 28 we see a whole list of things that God will bring upon His people if they don't do all that He says. God cannot allow His people to live normal lives in their sins. He is compelled to interfere and judge them that they might repent.
Understanding Sin in Our Livesreflections
This chart based on Galatians 5:7-8 shows that God judge all sin, whether believer or unbeliever. We must reject any thoughts that deny a sin's consequence on a Christian's life. His sins will affect not only himself but others. Our sins are like seeds which drop into the soil and spring up around us and thus devasting the ones we love the most.
Genesis Introduction: Introduction to Genesis | Outline and Genealogies | Genesis' Chronologies (5 & 11) | Unified Themes of Genesis