The point of church discipline is restoration. It is. We want to reclaim a person who has turned away from the truth in some fashion. When someone has been disciplined from a church, should he be judged to be unsaved? Yes and No. Yes, in that Jesus said in Matthew 18, "let him be unto thee as an heathen man and a publican." It doesn't say that we think he's unsaved. We are to regard him as unsaved. We don't really know.
Why else would we regard someone as unsaved, who has been disciplined from a church? Consider 1 John 2:19: "They went out from us, but they were not of us; for if they had been of us, they would no doubt have continued with us: but they went out, that they might be made manifest that they were not all of us." Here it's a matter of what "were not of us" means. If a person was "of us," he no doubt would be with us. "Of us" is expressing salvation, especially as you look at the context (1 John 2:3-4; 2:15-17). He's not with us. He's in the world. He loves the world more than us. The love of the Father is not in him. If the love of the Father is not in you, then you aren't saved. God is love. No love, no God.
The point of church discipline is not condemnation. However, we are instructed to regard people as not saved. It's like this. We don't know someone is saved just because he professes to be saved. That is clear from James and 1 John. Jude says that they creep in unawares. Creeping in unawares means that we don't know it. Churches have unsaved people in them, so we're not even sure if everyone in a church is saved. Remember Judas. Nobody but Jesus knew he was lost. And he was nasty.
Here is a list of points to remember.
1. There is a faith that does not save.
John 2:23-25: "Now when he was in Jerusalem at the passover, in the feast day, many believed in his name, when they saw the miracles which he did. But Jesus did not commit himself unto them, because he knew all men, And needed not that any should testify of man: for he knew what was in man."
James 2:17: "Even so faith, if it hath not works, is dead, being alone."
2. So someone who professes faith may not have a faith that saves.
3. We do not judge whether someone has faith by his profession, but by his lifestyle (that's how he even judges his own faith).
Matthew 7:21: "Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven."
4. The ultimate manifestation that someone is saved is that he endures or overcomes to the end, because faith that saves will endure.
James 1:12: "Blessed is the man that endureth temptation: for when he is tried, he shall receive the crown of life, which the Lord hath promised to them that love him."
Revelation 2:7: " To him that overcometh will I give to eat of the tree of life, which is in the midst of the paradise of God."
Matthew 10:22: "And ye shall be hated of all men for my name's sake: but he that endureth to the end shall be saved."
5. People who will not endure shouldn't be regarded as saved people.
We don't help them by regarding them as saved. We should say like Paul, "Examine yourselves, whether ye be in the faith" (2 Corinthians 13:5).