“For Christ is the end of the law for righteousness to everyone who believes” (Romans 10:4).
Until a truth seeker accurately understands the relationship between the Law of Moses and Christ and His gospel, he will ever be vulnerable to the unrighteous state of misplaced zeal.
Jesus did not come to revolt against the Law but to obey and thus fulfill it (Matthew 5:17). In God’s eternal purpose, the Law of Moses was never intended to be God’s permanent solution to human sin. It never could be, because—as Paul explained in Romans 7—the Law was too holy, just, and perfect for anyone infected with the spiritual disease called sin.
It is true that Christ fulfilled every jot and tittle of the Law (Matthew 5:18). It is true that Christ abolished the old covenant’s authoritative commands (Ephesians 2:15). And, it is true that the Law was taken out of the way, having been nailed to Christ’s cross at Calvary (Colossians 2:14).
It is also true that the goal/end of the Law was to foreshadow, promise, and predict the Christ while guarding the physical descendants of Abraham, Isaac, and Jacob until Christ and His gospel were revealed (Galatians 3:23). “Therefore, the Law was our tutor to bring us to Christ, that we might be justified by faith. But after faith has come, we are no longer under a tutor” (Galatians 3:24-25).
The Law of Moses was a means to an end. Therefore, Christ is the end of the Law.
This means your zeal should be focused like a laser on the end, not the means.