Please notice that my posts 28, 29 and 31 addressed misrepresentations. Justification based on faith is an extremely important topic. But rather than address it, I must spend an inordinate amount of time addressing the misrepresentations (with no quotes to support) posted by opponents.
If we translate the preposition "ek" as based on, "dia" as through, "ex" as from, and the construction lacking a separate preposition as by, and arrange the phrases to my the meaning more clear,we get these translations of our verses:
Romans 3:28 For we consider a person to be justified by faith apart from the works of the law.
Romans 5:1 Therefore, since we have been justified based on faith through our Lord Jesus Christ, we have peace with God.
Galatians 2:16 Knowing that a person is not justified from the works of the law but through the faithfulness of Jesus Christ, even we have come to believe in Christ Jesus, so that we may be justified based on the faithfulness of Christ and not from the works of the law, because from the works of the law no one will be justified.
Galatians 3:24 Thus the law has become our escort to Christ, so that we could be justified based on faith.
In summary, we are justified based on our faith in Christ being credited as righteousness by God through the faithfulness of Christ on the cross.