"Blessed are ye, (says Jesus first to the Apostles, and then to all succeeding preachers) when men shall revile you, and persecute you, and ... shall say all manner of evil against you falsely, for my sake" (Matthew 5:11).
Indeed, it is not possible for such false preachers to do anything else. If they did not speak against the true preacher, they fear they would be asked, "Why did ye not then believe him?" (Matthew 21:25). We cheerfully go on preaching no matter what these false ministers say. We have no regard for what men or demons say against us, or do to us."