The Bible commands Christians: 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 Corinthians 5:11.
Is this Bible law harsh and demeaning? Just consider this: When a hardened criminal is sent to prison for breaking the law, is that viewed as harsh or coldhearted?
No, because the public has the right to safeguard the peace and security of the community.
In effect, the criminal is disfellowshipped from law-abiding society during his prison term.
Similarly, the Christian congregation is justified in expelling unrepentant wrongdoers from their midst.
Why? Because the congregation must be a haven from immoral predators and other willful practicers of sin.
Realizing that one sinner can destroy much good, the apostle Paul commanded fellow believers: Remove the wicked man from among yourselves. 1 Corinthians 5:13
This action prevents the sinner from spreading corruption in the congregation, and it protects the congregation’s good name.
2 John 9:11
Everyone that pushes ahead and does not remain in the teaching of the Christ does not have God If anyone comes to you and does not bring this teaching, never receive him into your homes or say a greeting to him.
Why is such a firm stand appropriate even today?
Well, reflect on the severe cutting off mandated in God’s Law to Israel.
In various serious matters, willful violators were executed. When that happened, others, even relatives, could no longer speak with the dead lawbreaker.
Though loyal Israelites back then were normal humans with emotions like ours, they knew that God is just and loving and that his Law protected their moral and spiritual cleanness.
So they could accept that his arrangement to cut off wrongdoers was fundamentally a good and right thing.
Of course if you do not believe the Bible or in God, then no answer will be acceptable coming from a Jehovah Witness.