Two problems with your assertion here, first James explicitly says, "Thus, you can see that his (Abraham) faith and his (Abraham) works were active together; his (Abraham) faith was brought to completion by works.Abraham never completed the work at Mt Moriah.
The angel stopped Abraham from completing that work.
Thus, Abraham was still reckoned righteous by the Lord because he believed the Lord.
Second if faith alone is sufficient why do the angel have to stop him. Look just repeating errors you have taught isn't impressive. Scripture tells an entirely different story but for some reason some people just stop using the brain God gave them.