The subject of true and false prophesying has been raised recently. See @derekradney especially. It’s important because as @PLeithart notes in his fine commentary on 1&2 Kings, Israel’s history is not so much political as it is prophetic.
One example - Ahab. Not only does he despise & reject the three prophets God mercifully sends him, but he embraces the hundreds who falsely prophesy in God’s name. That latter fact is the issue. It’s not that the false prophets are invoking Baal but YHWH.
Ahab’s prophets are false for numerous reasons but let me cite just one. They aimed to reinforce an unholy alliance between Judah’s future king and Ahab’s daughter Athaliah, a disaster that resulted in the attempted destruction of the Messianic hope.
Prophetically backing unholy alliances - defending the union of what God has separated - nearly led to the disastrous destruction of Judah. They are false not simply because of false predictions but because of errant theology.
I’m going to put this as plainly as I can. The Church today is disturbed, divided, and misled because of false prophets. They aren’t false in an obvious sense (or only in a narrow ‘charismatic’ sense) because they operate within otherwise orthodox settings & use orthodox terms.