I'm not missing James' point, nor am I advocating that he is not in harmony with the other apostles and Jesus. I'm saying that the logical conclusion of your position on justification leads one to ask these questions.
Paul says Abraham was justified by faith in Genesis 15:6. You say that was when he was born again, or justified eternally. Ok, James points to that same text, and then says that Abraham wasn't only justified by faith during his life, pointing to Genesis 22. James says Abraham was justified by works also, not only by faith. Now, if justification by faith is eternal, I must conclude that by works is as well, and we have a problem here.
However, if justification by faith is a timely blessing (called by Paul a "blessedness"), something Abraham was blessed to enjoy during his active walk by faith after God (discipleship), then there's no problem. James is discussing discipleship too. We, as faithful followers of God, ought to perform good works wrought in faith. If we say we are faith and do not good works, we are like the person who tells someone who is cold and hungry to be warm and filled though he gives that person nothing that would actually help him. How do we see Abraham's faith? By his works. We see this great example of faith at work when Abraham took his son up that mountain to sacrifice him in obedience to God. Thus Abraham is said to be justified by works.