Couldn't agree more. The problem is that some mean saved but not living a life that testifies to Christ's indwelling presence, and some mean not saved.
If a person is in sin, claims to be saved, then someone should follow the scriptures and go to that person and tell them that they need to repent. If they refuse, then take a second person, (an elder of the church). If they refuse to repent, let the local body of believers they belong to decide to tell them that they refuse to repent and are thus disfellowshipped. Sure, they can still come to that church church, but they (as Jesus said) would be treated like a heathen man.
And so, if that youth pastor person ultimately refused to repent... in the end, was he never truly saved to begin with? And if so, how could they he duped the church for so long?
Maybe. Maybe not. That's God's decision.
What we are called to do is not judge whether he was saved or not, but treat him as if he weren't. There's a difference.
IOM, that would disqualify him from serving in office at a church. It would also mean urging him into reconciliation with God.
I like the way that is stated in 2 Corinthians because it has universal application. Regardless of where the person stands with God, they are urged to be made right with him.
For the unbeliever, that would be encouraging him to get saved. For the believer, it would be encouraging him to deal with sin in his life and go into a deeper walk with Christ.
But if God has something against you, or a church as in Rv. 2+3, then they are not walking in fellowship. a relationship existed, but like a marriage with rifts, there are divisive issues, and thus "we need to talk."
And the Lord works to bring errant souls to repentance and effectual faith, and continued impenitence after being convicted is dangerous. (Hen. 10:25ff)
But when we are judged, we are chastened of the Lord, that we should not be condemned with the world. (1 Corinthians 11:32)