Amen! 1 Peter 1:9 - receiving the end of your faith—the salvation of your souls. As for James 2:14, we read of one who says/claims he has faith but has no works (to validate his claim). That is not genuine faith, but a bare profession of faith. So when James asks, "Can that faith save him?" he is saying nothing against genuine faith, but only against an empty profession of faith/dead faith.
In James 2:19, we see that the demons believe "mental assent" that "there is one God" but they do not believe/entrust their spiritual well being to Christ; have faith/reliance upon Christ for salvation.
In other words, they do not believe on the Lord Jesus Christ (Acts 16:31) and are not saved. Their trust and reliance is in Satan, as demonstrated by their rebellion in heaven and continuous evil works.