Jeremiah 43:2, commentary and pictures

The chapter belongs to the history of the two years before Jerusalem fell.
The speakers are Azariah the son of Hoshaiah, and Johanan the son of Kareah, and all the proud men, being the remnant of the Jews left in Judea.
Their words came after they asked Jeremiah for the word of God and promised to obey whatever answer he brought, but their request was insincere, for they had already decided their course and wanted advice that agreed with their own wishes, not guidance they meant to obey.
Jeremiah directed them not to go down into Egypt to sojourn there, but they rejected the warning, disobeyed, and went anyway.

They angrily called Jeremiah a liar, saying he spoke falsely and denying that the Lord their God had sent him to say, Go not into Egypt to sojourn there.
They further charged that Baruch had turned Jeremiah against them to deliver them to the Chaldeans, meaning that while Jeremiah spoke as giving the word of God they claimed he was only speaking what Baruch wanted him to speak, suspecting him of speaking against their interests; the charge shows how intimately Baruch was connected with Jeremiah in the work of God.

Their denial reveals pride and stubbornness in refusing a plain message from God when it conflicts with one's wishes, blaming the prophet rather than facing that they were opposing God.
Pride leads people to refuse a message of reproof given through God's chosen messenger.
The verse thus exposes a serious sin of suspicion and unbelief toward one God had called, a rejection of Jeremiah as a true prophet and abuse of God's messenger, and those wicked men were punished by God with utter destruction.

The verse illustrates a broader pattern in which people who claim willingness to obey reject the message and abuse the messenger when tested.
The same sin is repeated when those professing to accept the manifestation of the spirit of prophecy claim, when reproof comes contrary to their expectations and wishes, that those intimately connected with it influenced its decisions, which is a most serious charge against what purports to come directly from God, for God never chooses a medium through which to speak that another contrary influence can step in and counterfeit, while the devil works in copartnership with others.