Peter's so-called hypocrisy had to do with the fact that Peter was an apostle to the circumcision and Paul to the uncircumcision. From Paul's perspective, as the apostle to the Gentiles, Peter was compromising the gospel. But from Peter's perspective, he may have only been obeying a principle of scripture, that we ought to bear the infirmities of the weak (Romans 14, Romans 15:1). In the passage mentioned, it becomes clear that Peter and the rest were correct to eat only what was kosher in the presence of those who had qualms of conscience about un-kosher meats. See Romans 14:15, Romans 14:20-21, Romans 15:1. From Paul's perspective as the apostle to the Gentiles, Peter was sinning; because he was sending the message that Gentiles needed to behave as Jews in order to be saved. He was very likely unaware that he was sending that message. So then, Peter was not committing a willful sin in what he did; his sin was unintentional and he very likely believed he was doing the right thing.
You are reading a great deal into the Scripture. The text TELLS us that Peter had been living as a Gentile (Galatians chapter 2, verse 12a), before the Jewish Christians arrived--that he was afraid of being criticized by them after they arrived (12b and 12c). Peter's spiritual weakness was quite obviously cowardice (the basis for his betrayal of Christ outside the house of the High Priest). That tendency to cowardice, as a part of Peter's sin nature, was apparently still in place in the episode Paul recounts in Galatians. But Peter is eventually martyred, so he was
near perfection in this life. But only Jesus Christ was morally perfect while in this world--His name is above all names. Martyrdom brings a mortal human being very close to the heart of God. That is why the martyrs are honored above others of God's children.
I contend that if anyone is born of God, they will not commit willful sin(s). 1 John 3:3-9, Hebrews 10:26-31.
Oh nonsense--that is NOT what those passages teach. ALL sin is WILLFUL for those who have the indwelling presence of the Holy Spirit telling them that some thought or action is sinful. Remember--God has given us a way to escape being tempted beyond which we are able to stand. Even though we pledge ourselves to obey Christ, we fail occasionally and are taken to task by the Holy Spirit. We then repent and are forgiven--(1 John 2:1-2). Your way makes us blind to our own sin because we already think we are perfect. The passages you cite, are speaking about those who take advantage of God's grace and think they can stay in their former life of being imprisoned by sin. That was supposed to have been put behind in the new birth. At the end of 1 John, John tells his readers to stay away from idols (1 John 5:21). Idolatry is a gross violation of God's law, and was a very, very sinful lifestyle. Why would John need to warn them about it, if they had been perfected? He was warning them to avoid returning to their lives of wallowing in the mud of idolatry--not telling them they must be perfect in holiness.
It seems to me that you are the one confusing the two. In Hebrews 10:10 and Hebrews 10:14, do you confuse the sanctification spoken of there and take it for justification? I think that you very likely do.
No--both of those passages are speaking of justification. Hebrews 10:14 even speaks of "those who are
being made holy" implying a
continuous process (i.e. sanctification) after citing the justification (perfect before the law of God) at the beginning of the passage--made possible by Christ's one sacrifice--for all time.
Your misinterpretation points to one of the problems with KJV-only. Whenever it is in error, and I believe it errs if it refers to justification (a once-for-all sacrifice that makes us legally perfect) as "sanctification". A sound systematic theology must account for ALL statements in Scripture--even those which appear, at first glance, to be contradictory. We can have full confidence that any "contradictions" will yield to further study. The Scriptures are a perfect reflection of the mind of God (in their original languages). I looked up the Greek and the Greek word for "practice" is used--meaning that one does not fall into habitual sin if one is born from above and has the indwelling presence of the Holy Spirit.
The more one allows the Scriptures to speak into our minds, the more we know that is true. It is improper to form a theology and impose it on the Bible. We must read book, chapter and verse, over and over to become saturated with truths from the mind of God. Humans, because we are simple-minded in comparison to God, must rely on His Spirit to form that body of truth in our minds. Forming a theology and then taking verses out of their contexts as "proof" is sure to mislead.