Jeremiah compares the prophets of Jerusalem to those of Samaria, but says something worse was found in Jerusalem. What could be more wicked than openly worshipping Baal?
The prophets in Jerusalem weren't just foolish; they were depraved. While the prophets in Samaria openly turned to Baal, leading people astray in a more obvious way, the prophets in Jerusalem masked their sin.
The Danger of Deception
They claimed to speak for God while living in lies and promoting evil. This made their sin even more offensive to God. It's like a doctor who claims to heal but secretly poisons their patients. Their betrayal of trust, hiding wickedness behind a facade of holiness, was a "horrible thing" in God's eyes.