Jeremiah 13:27; “I have seen thine adulteries, and thy neighings, the lewdness of thy whoredom, and thine abominations on the hills in the fields. Woe unto thee, O Jerusalem! wilt thou not be made clean? when shall it once be?”
Jeremiah 27:8; “And it shall come to pass, that the nation and kingdom which will not serve the same Nebuchadnezzar the king of Babylon, and that will not put their neck under the yoke of the king of Babylon, that nation will I punish, saith the LORD, with the sword, and with the famine, and with the pestilence, until I have consumed them by his hand.”
How did Lehi read the writings of Jeremiah in the supposed brass plates when they left in 600 BC? Jeremiah was written anywhere from BC 630 to BC 580 leaving a lot of room for speculation. Furthermore the writings of Nephi are far too similar to believe God would use the same phrases in sentence structure while contradicting Himself at the same time.
The other problem is found in the total disregard and disobedience to what the prophet Jeremiah said! Why did Lehi leave when Jeremiah was warning everyone to stay? Those who left Jerusalem on their own met death while those who heeded his warning were taken into captivity for 70 years and then returned to Jerusalem just as God promised – Jeremiah 29:10-11.
This is the only group of Israelites who disobeyed God and lived. There’s no other historical evidence of anyone living through the siege except for the claims of Joseph Smith in the Book of Mormon.