These things almost always degenerate into a proof-text war. More electrons have been spent doing that than we can count, and I personally have developed a very sensitive and advanced detection and response mechanism to it - I simply skip the post, or the thread, or the forum, or the site, entirely, and I do it quickly.
AISI, the bottom line is that there is an obedience of faith that touches on both faith and works. It's generated by faith in God's goodness (thereby drawing us into God), not by the belief that we can save ourselves (which would lure our hearts away from Him), but it touches on works because it's something that we do. For instance, we all had to accept the free gift of life that Christ offered us.
Abraham had to prepare, and then defend from the birds of prey, the sacrifice that God then used in cutting the Abrahmic covenant. If Abraham hadn't done his part, there would have been no covenant. Does that give Abraham the right to boast about his works? In no way. How could that minimal effort compare to the salvation and promises God offered? It would be an insult to the Spirit of Grace and indeed it would show an insincere heart toward God. The proof of that is that God walked alone through the animal parts, rather than the customary both parties walking together, signifying that He was taking responsibility for fulfilling the promises solely upon Himself.
Paul and James, btw, are in perfect harmony on this. Paul never taught a cheap grace, he taught and modeled a complete and energetic consecration no matter the price. And in promoting works to complete our faith James was essentially giving us a reality-check, so that we weren't deluding ourselves with a dry intellectual assent rather than holding to a genuine obedient faith in God.
The problem, AISI, is that man takes the obedience of faith, which is necessarily baked into the salvation equation, and translates it into a religious regimen of works. Do this, don't do that. We are warned against this time and again, as in Col. 2. There is no end to the damage the religious spirit can do, and it is very easy to fall into. That is why we are warned so strongly to be on our guard against it.
For freedom Christ has set us free; stand firm therefore, and do not submit again to a yoke of slavery. -Gal 5.1