“Protestants have abandoned the Greek manuscript chain and the translations of them upon which Sola Scriptura was based. Why does it matter ? The KJV contradicts MrRogers’s assertion that there is no condemnation of a Christian...”
No. We use the Greek manuscripts, although not the translations of them.
The NASB:
“GREEK TEXT: Consideration was given to the latest available manuscripts with a view to determining the best Greek text. In most instances the 26th edition of Eberhard Nestle’s NOVUM TESTAMENTUM GRAECE was followed.”
AFV: “The KJV contradicts MrRogers’s assertion that there is no condemnation of a Christian while a Christian is committing mortal sins (walking after the flesh), and not walking after the Spirit.”
Paul says later in Chapter 8:
“However, you are not in the flesh but in the Spirit, if indeed the Spirit of God dwells in you. But if anyone does not have the Spirit of Christ, he does not belong to Him. 10 If Christ is in you, though the body is dead because of sin, yet the spirit is alive because of righteousness...12 So then, brethren, we are under obligation, not to the flesh, to live according to the flesh— 13 for if you are living according to the flesh, you must die; but if by the Spirit you are putting to death the deeds of the body, you will live. 14 For all who are being led by the Spirit of God, these are sons of God. 15 For you have not received a spirit of slavery leading to fear again, but you have received a spirit of adoption as sons by which we cry out, “Abba! Father!†16 The Spirit Himself testifies with our spirit that we are children of God, 17 and if children, heirs also, heirs of God and fellow heirs with Christ, if indeed we suffer with Him so that we may also be glorified with Him.”
And as Paul wrote in his next letter to the Corinthians:
“17 Therefore, if anyone is in Christ, he is a new creation. The old has passed away; behold, the new has come. 18 All this is from God, who through Christ reconciled us to himself and gave us the ministry of reconciliation; 19 that is, in Christ God was reconciling the world to himself, not counting their trespasses against them, and entrusting to us the message of reconciliation. 20 Therefore, we are ambassadors for Christ, God making his appeal through us. We implore you on behalf of Christ, be reconciled to God. 21 For our sake he made him to be sin who knew no sin, so that in him we might become the righteousness of God.”
The scripture does not divide sins into mortal and venial, for ALL sins are mortal - the wages of sin is DEATH. But believers are born again, into a new life:
“But to all who did receive him, who believed in his name, he gave the right to become children of God, 13 who were born, not of blood nor of the will of the flesh nor of the will of man, but of God.” - John 1
“...31 but these are written so that you may believe that Jesus is the Christ, the Son of God, and that by believing you may have life in his name.” - John 20
The One who gives new life knows what He is doing. The one who works his way to heaven will never get there. To return to Romans 8:
“29 For those whom he foreknew he also predestined to be conformed to the image of his Son, in order that he might be the firstborn among many brothers. 30 And those whom he predestined he also called, and those whom he called he also justified, and those whom he justified he also glorified.”
You do not use the same Greek manuscripts that were used when the Sola Scriptura doctrine was devised and have abandoned those used to produce the Authorized Version of the scriptures (KJV). Therefore the Protestant Reformation did not really have the same Bible that it is using now. Its sole source of truth is evolving.