The Spirit of the Lord has brought two scriptures to my mind that helps answer the question, “What about preachers who honestly teach error? Here are the two scriptures the Holy Spirit brought to my mind: 1) “Then said Jesus, ‘Father, forgive them for they know not what they do.’ And they (the Roman soldiers) parted His raiment, and cast lots” (Luke 23:34). And, 2) “Therefore to him that knows to do good, and does it not, to him it is sin” (James 4:17).
Those who are blinded by Satan the devil regarding something they believe and teach, and who in all sincerity believe the course they have taken is in accordance with the truth of God fall into a separate category than those who knowingly, willfully practice deceit and spread errors. Though what they are doing may be wrong or sinful, it is not charged against them as sin. Still they will have to give account to God for failing to really “prove” all things, including any false doctrine they may have accepted as truth. A preacher’s responsibility is a weighty one.
Note well that those whom Jesus asked the Father to forgive were ignorant Roman soldiers, not supposedly converted men. None of them had ever read even a scrap of scripture. They had never performed the role of instructors in spiritual matters. Of this type, Jesus asked the Father to forgive them for aiding and abetting in His execution. They really did NOT know the good and right thing to do would have been to set Jesus free. Preachers who have Bible college or seminary training, who have Bibles, who have read and gleaned much understanding from those sacred texts, are far more responsible if they fail to believe and teach God’s Word accurately.