"And it came to pass that the Jews did mock him because of the things which he testified of them; for he truly testified of their wickedness and their abominations; and he testified that the things which he saw and heard, and also the things which he read in the book, manifested plainly of the coming of a Messiah, and also the redemption of the world."
In response to Lehi's prophesying and preaching the Jews mocked him, which is not uncommon in sharing the word of God. Bible examples are Noah, the apostles, and Jesus Christ Himself. when the heart is hardened to the point nothing touches it mocking the prophets of God is the least of the outcomes. The treatment of the prophets was poor and the anger of God grew as they continued to be sinful and mocking in the ways of God.
Those who were righteous and listened to the prophets were led away to safety while the sinners that refused to listen to the Lord were allowed to stay in a doomed city. As the justice of God to those who do not hearken(listen) to the words of God.
Even when Lehi spoke of the coming of the Messiah, Jesus Christ, they became even more enraged. This reaction in the scriptures is sadly common as well.. The wicked have no desire to hear of the Savior. But the joy of His coming cannot be held back. The prophecies and testimonies of the disciples of Christ have come true and will continue to come true.