When James spoke of being able to know someone has 'faith that saves' he focused attention on the works, because IF the Life of God is in a man, the character of God will show forth. James was not teaching that to have salvation you must do works to earn it. He was explaining that IF you have it you will see the works as evidence. Folks turn the perspective on its head. James was teaching folks how to know if someone had saving Faith, as he said 'I'll show you my faith (that saving faith which God sees in the inward parts and sends His Spirit into them because of it) by my works.' He never said I'll get salvation by my works.
From that set of assertions regarding a personal interpretation of what "works" means and knowing that Protestantism claims that each individual can read the mind of God and claim that when God Himself said something He didn't mean exactly what He said, it follows that Paul wasn't right when he said :
Romans 11:21 For if God hath not spared the natural branches, fear lest perhaps he also spare not thee.
So, now along with denying the power of the Holy Spirit, reading the mind of God, and claiming the individual has the right to ignore verses that don't fit into their personal preferences, we now have clear evidence that Protestantism by definition has to disagree with Paul. At least when they want to disagree with Paul.