Do you think Paul should have been kind to the young man and not excommunicated him ???
"All things are lawful to me, but not all things profit. All things are lawful for me, but I will not be brought under the power of any.
Meats for the belly and the belly for meats, but God shall destroy both it and them.
But the body is not for fornication, but for the Lord; and the Lord is for the body. And God has both raised up the Lord, and also will raise us up by His own power.
Do you not know that your bodies are the members of Christ? Shall I then take the members of Christ and make them the members of a harlot? Let it not be! Or do you not know that he being joined to a harlot is one body? For He says, The two shall be one flesh.
But he being joined to the Lord is one spirit.
Flee fornication. Every sin that a man does is outside the body, but he who commits fornication sins against his own body. Or do you not know that your body is the temple of the Holy Spirit in you, whom you have of God? And you are not your own, for you are bought with a price. Therefore glorify God in your body and in your spirit, which are God's." (I Corinthians 6:12-20)
Is the root cause of all fornication not idolatry? Personally I think that your example shows that Paul would encourage the congregations he formed to live Godly lives, understanding the weakness of the flesh, but he would also deal with any individual continuing to commit fornication without repentance, in a way that was necessary and befitting, so as to save the individual's soul, and also for the good of the body of Christ. So I think the word "unrepentant" is the operative word. Any individual who accepts Jesus as Savior must also accept Him as Lord, but Jesus is only my Lord to the extent to which I submit to Him:
"Afterwards the other virgins came also, saying,
Lord, Lord, open to us. But he answered and said, Truly I say to you,
I do not know you.
Therefore watch, for you do not know either the day or the hour in which the Son of man comes. (Matthew 25:11).
"And why do you call Me Lord, Lord, and do not do what I say?
Whoever comes to Me and hears My words, and does them, I will show you to whom he is like.
He is like a man who built a house and dug deep and laid the foundation on a rock; and a flood occurring, the stream burst against that house and could not shake it; for it was founded on a rock.
But he who hears and does not perform, is like a man who built a house on the earth without a foundation, on which the stream burst, and immediately it fell. And the ruin of that house was great." (Luke 6:46-49).
I agree with you. The public church is already a compromised church. Full of people full of ideas but who lack humility. Full of compromises, and are being forced more and more through "hate speech" laws to do as the state forces them to. What about the day churches are no longer allowed to refuse "marriage" to certain "couples"? Churchianity is not Christianity.
Paul preached to crowds and established congregations of believers who met in one another's homes. I doubt that any buildings were built yet in his day so as to be considered "churches". Paul preached publicly but fellowshipped privately.