Jeremiah had begged Judah to escape this ghastly judgment of God, beseeching them to obey God's Word rather than the lies of false prophets (see Jeremiah 29:8-9), but Judah preferred to follow leaders and prophets who corrupted God's Word by mingling devotion to Him with idolatry. As God finally executed the judgment that He had warned of through Isaiah, Jeremiah and other true prophets, Jeremiah wept bitterly over how false prophets and corrupt priests had misled the people.
Jeremiah's words remind me of all the professing Christians who haven't learned from the mistakes and sins of Israel and Judah. Like them, we prefer false teachers to the truth of Scripture, and we open ourselves to the practices of the world. We won't tolerate talk of repentance or hell, much preferring sermons about blessings and God whispering sweet nothings in our ears.14 Your prophets have seen for you
false and deceptive visions;
they have not exposed your iniquity
to restore your fortunes,
but have seen for you oracles
that are false and misleading. ~~Lamentations 2:14 (ESV)
I don't know how God will judge professing Christians, but I believe we would be wise to pay attention to Judah's missteps. The Lord has shown grace to us just as He showed grace to the ancient Hebrews, and we mustn't abuse His grace as they did. He has given us even fuller revelation than He gave them, and (unless we are false converts) His Spirit empowers us to live in obedience. I praise Him for books like Lamentations that encourage us to shun false prophets in favor of His Word.