Summary: We are called to mark them who cause divisions. How much more so those who teach doctrinal error?
Titus 3:10 A man that is an heretick after the first and second admonition reject;
11 Knowing that he that is such is subverted, and sinneth, being condemned of himself.
A heretic after the first or second admonition you reject or have nothing to do with, not keep supporting their ministries. You approach him/her with the error and if they will not conform to the truth than you reject or shun them. You do not keep buying their books or sending money to their ministries. That is not being a Legalist or a "heretic hunter" that is biblical and it is necessary for a pastor to reprove and rebuke as well as exhort.
2 Tim 2:17 And their word will eat as doth a canker: of whom is Hymenaeus and Philetus;
18 Who concerning the truth have erred, saying that the resurrection is past already; and overthrow the faith of some.
1 Tim 1:20 Of whom is Hymenaeus and Alexander; whom I have delivered unto Satan, that they may learn not to blaspheme.
2 Tim 4:14 Alexander the coppersmith did me much evil: the Lord reward him according to his works:
Some have a problem with naming names. Paul did not have that complex. Note, he delivered two unto the devil. Also, note that Hymenaeus and Alexander were in double trouble.
Dr. Walter Martin, The Kingdom of the Cults author, had no problem calling out false doctrine and those who taught those doctrines even doing so on a TBN episode. Hank Hanegraaff 's book, Christianity In Crisis: The 21st Century is an update of the original title. Dr. Michael L. Brown is author of Playing With Holy Fire: A Wake-Up Call to the Pentecostal-Charismatic Church.
All three of these books should be read by the discerning Christian seeking truth in this chaotic age. I promise it will upset some, if not all, who read them as some of their favorite teachers will be not shown in a good light.
Ephesians 4:11 And he gave some, apostles; and some, prophets; and some, evangelists; and some, pastors and teachers;
12 For the perfecting of the saints, for the work of the ministry, for the edifying of the body of Christ:
13 Till we all come in the unity of the
faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the stature of the fulness of Christ:
14 That we henceforth be no more children, tossed to and fro, and carried about with every wind of doctrine, by the sleight of men, and cunning craftiness, whereby they lie in wait to deceive;
15 But speaking the truth in love, may grow up into him all things, which is the head, even Christ:
16 From whom the whole body fitly joined together and compacted by that which every joint supplieth, according to the effectual working in the measure of every part, maketh increase of the body unto the edifying of itself in love.
There are many winds of doctrine out there that are toxic to the soul and are deceiving many. Pastors need to start speaking to these dangerous teachings and calling names to protect the flock of God from wolves in sheep's clothing. Truth is essential in every age, but in this age of demonic deception it is vital for survival. Maranatha!