This error is based mostly on assuming the behaviour of the Christian is related to justification. We all fall short in our thoughts words and deeds in trying to do what our Heavenly Father desires of men. This error is preached, it seems, to guilt the believer into either changing behaviour and perhaps increase service in the church. This hurts people who are sensitive to the law and loves Jesus that he or she would wish to follow perfectly. However, is God really angry with us for our failures to follow his commands and desires for our lives?
Colossians 1: 21 And you, who once were alienated and hostile in mind,doing evil deeds, 22 he has now reconciled in his body of flesh by his death, in order to present you holy and blameless and above reproach before him, 23 if indeed you continue in the faith, stable and steadfast, not shifting from the hope of the gospel that you heard, which has been proclaimed in all creation under heaven, and of which I, Paul, became a minister. ESV
In this letter to the Colossian congregation on will see that we are reconciled with God by the death of Jesus for our sins. We are also by virtue of the innocent and bitter suffering and death of our shepherd presented holy and blameless. This should answer once and for all the fear that God is angry with us and will reject us or we are not truly saved due to our falling short.
One can be so hurt by this wretched error that one can lose faith in Jesus. One may err from the faith and adopt a "why bother trying since my trying is or was a failure?" This hopelessness often leaves one erring from the faith rather than keeping in repentance and true faith in Christ.
This error is not beholding the bitter suffering and death of Jesus in a correct manner. A true view will see God's fierce wrath toward sins as well as how that Jesus bore this wrath for all people. Hence the teaching of God being angry towards a believer is an actual slap in the face to the Crucified Lamb of God. When one has been granted repentance and faith in the finished work of Christ God is no longer angry with the believer. And the grateful response of the Christian is to out of gratitude seek to guard the words of Jesus seeing them as a Light unto his or her path.
Let us trust this good news and live in the peace it gives.
In the name of Jesus. Amen. †