There is an inconsistency about some Christians that teach the doctrine of separating our saving faith from our works.
Some Christians teaching it remain faithful to it. They preach that once we are saved forever by our saving faith, no works ever have anything to do with it, nor can our works ever have anything to say about it. They teach that our saving faith can never be judged by our works. As saved believers, our works can never be judged with condemnation by God nor man. Through saving faith alone, we have no more condemnation by works.
However, not all of them are faithful to the doctrine and practice something else. They teach our faith is dependent upon our works, because our faith can be judged by works. They teach a Christian's confessed faith in Jesus Christ can be judged as saving faith or not by our works. At some point in the Christian confession, they want to draw a line in the sand, and begin to judge one another as being saved or not based upon our works. And they further say God has already done so by seeing the heart first. So both God and man judges a confessing Christian faith by our works.
Now, once again, I have no problem with that, since it is the Bible confirmed by Jesus (Matthew 18:17), Paul (1 Cor 5:11), and all of James 2.
And so, the inconsistency is obvious. If none of our works in this life truly have anything to do with being saved by our faith in Christ alone, then no works we do can ever judge our faith and salvation.
If our faith and salvation can be judged by our works, then our faith and salvation becomes dependent upon our works. If our saving faith can be objectively judged by our works with Jesus and His church body, then our saving faith can never be separated from our works.
If any Christian ever judges another confessing believer as not having saving faith, because of their works, then that Christian does not believe in being saved and justified by saving faith alone, without works having anything to do with it in sight of God and man.
I've seen some true believers in the doctrine of saving faith without works, that argue with the hypocrites that also try to judge any confessing Christian's faith by their works.
Some even go so far as to judge our salvation based upon whether we doctrinally agree with them or not. That of course is unbiblical zealotry. Afterall, if we judge other Christians unsaved, simply because they disagree with our doctrine, then how can we ever be corrected when needed?
Such zealots believe their doctrinal teaching is perfect. This is while condemning anyone preaching Christian perfection in Christ. Plainly they have no problem with overlooking a certain amount of sinning in life as being normal Christian living, but if anyone dares disagree with their perfect doctrine? There's gonna be hell to pay for it.