Theysaid, Itisfalse - Or, as the Chaldee has it, Thou liest. Or, perhaps, it might be thus understood, "We know he has said nothing but folly and lies, nevertheless, let us hear what he has said.
Matthew Henry
Concise Bible Commentary
Those who faithfully deliver the Lord's message to sinners, have in all ages been treated as madmen. Their judgment, speech, and conduct are contrary to those of other men; they endure much in pursuit of objects, and are influenced by motives, into which the others cannot enter. But above all, the charge is brought by the worldly and ungodly of all sorts, who are mad indeed; while the principles and practice of the devoted servants of God, prove to be wise and reasonable. Some faith in the word of God, seems to have animated Jehu to this undertaking.
SDA Bible Commentary (limited)
Volume 1-7
12. It is false. No, they had not even guessed the prophet’s purpose, but they were eager to know. Why try to keep it a secret? Jehu might well reveal the matter to them, then and there. The Biblical record vividly portrays the excited curiosity of the officers concerning the important message they knew had just been given the commanding general of the armies of Israel.