In Galatians, Paul took issue with the Halakhah, not God's word. Halakhah was a massive collection of human opinion that placed a yoke on its followers.
John Ritenbaugh reiterates that Paul's target in Galatians 2:16 was a syncretism of Judaism with strict Pagan ascetic Gnosticism and certainly not God's law. We need to avoid the Protestant ditch of "Christ did it all" leading to no attempt at la. . .
Paul never taught any Jew to forsake the Law of Moses, but he did warn against Pharisaical additions for the expressed purpose of attaining justification.
Richard Ritenbaugh, focusing on the Pharisees, analyzes the reasons for their continuous condemnation. Having their origin in the days of Ezra, the Scribes and Pharisees were extremely zealous for the law, separating themselves for this exclusive purpose. . . .
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