"On this view, God is not concerned with whether the person obeyed God by living a holy life or whether he was baptized."
Of course, no true Christian actually believes that God does not care about our obedience to Him. Sola Fide simply means we cannot earn our way into heaven by our good works. Nonetheless, this same misrepresentation is routinely parroted by apologists for the Church of Rome. Belief in Sola Fide is by no means an equivalent to upholding antinomianism. Another key component of the Catholic apologetics argument being critiqued is cited here as follows:
"Paul emphatically rebuked Peter. Man reaches heaven by the universal action of faith, which is always “working through love” (Gal. 5:6). Both Jews and Gentiles are justified by faith, as one family of God, which automatically dismantles any separation between them.
Galatians 2:16 has nothing to do with the Catholic belief that good works and receiving the sacraments are necessary, but not sufficient, for salvation. Deciding who spends eternity in heaven remains entirely the prerogative of our loving Creator, who has given ample guidance to the faithful. Our Protestant brothers and sisters have been misled about the meaning of the text, so let us gently show them their error (2 Tim. 2:25)."
Justification does not depend on obedience to the Mosaic Law, since it is by faith. Justification does not depend on any other law for the same reason. We are justified by faith, apart from the merit of good works. To say that we are required to follow the Law of Love rather than the Law of Moses misses the entire point. The Law of Love was literally embedded into the Mosaic system. So it is not something new by any means. For example, the concept was taught in Leviticus. The Law of Love was summarized in Deuteronomy 6. To say that a person is not justified by the Law encompasses the Law of Love. This excerpt from John Gill's Exposition of the Bible Commentary is pertinent here:
"for by the works of the law shall no flesh be justified; reference seems to be had to (Psalms 143:2) and contains a reason why these believing Jews relinquished Moses in his law, in whom they formerly trusted, and looked to, and depended on for their justification, because that by obedience to the law of works no sinful mortal man can be justified in the sight of God."
Consider also the following translation of Galatians 2:16:
"Yet we know that a person is put right with God only through faith in Jesus Christ, never by doing what the Law requires. We, too, have believed in Christ Jesus in order to be put right with God through our faith in Christ, and not by doing what the Law requires. For no one is put right with God by doing what the Law requires." (Galatians 2:16, Good News Translation)
Interestingly enough, the Good News Translation is approved by the Roman Catholic Church for adherents to use in study. Following is another translation of Galatians 2:16:
"yet we know that no one is justified by the works of the law but by the faithfulness of Jesus Christ. And we have come to believe in Christ Jesus, so that we may be justified by the faithfulness of Christ and not by the works of the law, because by the works of the law no one will be justified." (Galatians 2:16, New English Translation)
If we are justified by the faithfulness of Jesus Christ, then that would seem to imply the reception of benefits to believers on basis of His imputed righteousness. Either reading of Galatians 2:16 is supportive of justification by faith alone.