Here’s some arguments you might encounter:
Human society has always shunned people that do not conform to the rules. If you commit a crime, you may be punished by being sent to jail and excluded from society until you 'repent' by changing your attitude. Who determines these rules? In many lands, adultery and homosexuality are still punishable by death or jail. It is up to each group of people to decide the rules and the consequences for breaking them.
However, Paul did not disfellowship those that criticized him, i.e., the so-called “superfine apostles.” Read 2 Cor. 13:10 to see what he had in mind. Interestingly, Paul asked whether some of them had started ruling prematurely (cf. 1 Cor. 4:8)? Secondly, the GB claims to be “the faithful and discreet slave.” Would “judgment” be part of the commission of “the faithful and discreet slave”? By the way, is God not the ultimate judge, and did he not defer judgement to the Son (Acts 17:31)?
Here’s a list the scriptures the GB of JWs apply to judge, condemn and disfellowship individuals. Judge for yourself whether these are applied correctly.
15 Moreover, if your brother commits a sin, go lay bare his fault between you and him alone. If he listens to you, you have gained your brother.
16 But if he does not listen, take along with you one or two more, in order that at the mouth of two or three witnesses every matter may be established.
17 If he does not listen to them, speak to the congregation. If he does not listen even to the congregation, let him be to you just as a man of the nations and as a tax collector. (Mat 18:15-17 NWT)
Comment: Jesus instructed his disciples to treat an unrepentant wrongdoer “as a man of the nations.” Would they have greeted a man of the nations? Surely it would be good manners to greet such a person (not with a Christian kiss though – Rom. 16:16; etc.).
9 In my letter I wrote YOU to quit mixing in company with fornicators,
10 not [meaning] entirely with the fornicators of this world or the greedy persons and extortioners or idolaters. Otherwise, YOU would actually have to get out of the world.
11 But now I am writing YOU to quit mixing in company with anyone called a brother that is a fornicator or a greedy person or an idolater or a reviler or a drunkard or an extortioner, not even eating with such a man.
(1 Cor 5:9-11 NWT)
Comment: Naturally one would avoid such people, not socializing with them.
7 For
many deceivers have gone forth into the world, persons not confessing Jesus
Christ as coming in the flesh. This is the deceiver and the antichrist.
8 Look out for yourselves, that YOU do not lose the things we have worked to produce, but that YOU may obtain a full reward.
9 Everyone that pushes ahead and does not remain in the teaching of the Christ does not have God. He that does remain in this teaching is the one that has both the Father and the Son.
10 If anyone comes to YOU and does not bring this teaching, never receive him into YOUR homes or say a greeting to him.
11 For he that says a greeting to him is a sharer in his wicked works. (2 John 1:7-11 NWT)
2Jo 1:10 If anyone comes to you and does not bring this teaching, do not receive him into your house and do not give him any greeting
32 sn Do not give him any greeting does not mean to insult the person. It means "do not greet the person as a fellow Christian" (which is impossible anyway since the opponents are not genuine believers in the author's opinion). See NET Bible footnote.
Christian greeting: Rom. 16:16; 1 Cor. 16:20; 2 Cor. 13:12; 1 Thes. 5:26; 1 Pet. 5:14.
Comment: Above scriptures apply to the antichrist. Very few qualify as such.
9 I wrote something to the congregation, but Diotrephes, who likes to have the first place among them, does not receive anything from us with respect.
10 That is why, if I come, I will call to remembrance his works which he goes on doing, chattering about us with wicked words. Also, not being content with these things, neither does he himself receive the brothers with respect, and those who are wanting to receive them he tries to hinder and to throw out of the congregation.
11 Beloved one, be an imitator, not of what is bad, but of what is good. He that does good originates with God. He that does bad has not seen God.
12 Demetrius has had witness borne to him by them all and by the truth itself. In fact, we, also, are bearing witness, and you know that the witness we give is true.
(3 John 1:9-12 NWT)
16 But
shun empty speeches that violate what is holy; for they will advance to more
and more ungodliness,
17 and their word will spread like gangrene. Hymenaeus and Philetus are of that number.
18 These very [men] have deviated from the truth, saying that the resurrection has already occurred; and they are subverting the faith of some.
(2Ti 2:16-18 NWT)