Albert Barnes Commentary Jeremiah 38:4

"Then the princes said unto the king, Let this man, we pray thee, be put to death; forasmuch as he weakeneth the hands of the men of war that remain in this city, and the hands of all the people, in speaking such words unto them: for this man seeketh not the welfare of this people, but the hurt." — Jeremiah 38:4 (ASV)

For thus ... - Because he makes the men of war dispirited. No doubt this was true. Jeremiah, however, did not speak as a private person, but as the representative of the government; the temporal ruler in a theocracy being responsible directly to God.