In the spirit of Eph 4:29  Let no unwholesome word proceed from your mouth, but only such a word as is good for edification according to the need of the moment, so that it will give grace to those who hear and Act 18:26  and he (Apollos) began to speak out boldly in the synagogue. But when Priscilla and Aquila heard him, they took him aside and explained to him the way of God more accurately, the context of 2Pet 2 is stated in vs 1: even denying the Master who bought them, bringing swift destruction upon themselves.  Christ Himself bought the church age believer; Mat 20:28  just as the Son of Man did not come to be served, but to serve, and to give His life a ransom for many."   Act 20:28  Take heed therefore unto yourselves, and to all the flock, over the which the Holy Ghost hath made you overseers, to feed the church of God, which he hath purchased with his own blood.  Eph 1:14  Which is the earnest of our inheritance until the redemption of the purchased possession, unto the praise of his glory.  Rev 5:9  And they *sang a new song, saying, "Worthy are You to take the book and to break its seals; for You were slain, and purchased for God with Your blood men from every tribe and tongue and people and nation.  The false teachers refered to in vs 1 are believers who Christ has bought by His blood.  We find no mention in the Bible of Him purchasing the unbeliever or the unregenerate.

In rightly dividing the Word of Truth we see in Gal 5:17  For the flesh sets its desire against the Spirit, and the Spirit against the flesh; for these are in opposition to one another, so that you may not do the things that you please; the believer has two natures: the fleshly and the spiritual, the natural man and the spiritual man.

Paul writes to the Galatians: Gal 1:6  I am amazed that you are so quickly deserting Him who called you by the grace of Christ, for a different gospel;
Gal 1:7  which is really not another; only there are some who are disturbing you and want to distort the gospel of Christ.
Gal 1:8  But even if we, or an angel from heaven, should preach to you a gospel contrary to what we have preached to you, he is to be accursed!
Gal 1:9  As we have said before, so I say again now, if any man is preaching to you a gospel contrary to what you received, he is to be accursed!

If we compare 2Pet2 with Gal1we see the outcome of the curse is destruction. But destruction of what, the spiritual man; the new creation, the one in union with Christ? or the natural man; the earthly, the wordly, the carnal man under the influance of the old sin nature?

The ISV puts it this way: Gal 5:17  For what the flesh wants is opposed to the Spirit, and what the Spirit wants is opposed to the flesh. They are opposed to each other...

Destruction is God's promise for believers who desire to live in the flesh (self life), but it is the destruction of their flesh only.

1Co 5:5  I have decided to deliver such a one to Satan for the destruction of his flesh, so that his spirit may be saved in the day of the Lord Jesus.  That casting the offender out of the Church involved casting him back into the heathen world, which Paul habitually conceives as under the power of Satan.

Carnal believers are under the power of Satan just as the unbeliever.  Their self life choses to live a worldly life under the influence of the prince of the power of the air, even though their citizenship is in heaven, as is ours, but they refuse the cross of Christ and it's benefits.

Eph 1:3  Blessed be the God and Father of our Lord Jesus Christ, who has blessed us with every spiritual blessing in the heavenly places in Christ,  our blessings are spiritual and heavenly where we are seated and have our citizenship.

The body is destroyed but the spirit is saved in the day of Christ Jesus.

Joh 6:63  "It is the Spirit who gives life; the flesh profits nothing; the words that I have spoken to you are spirit and are life.

Rom 8:5  For those who are according to the flesh set their minds on the things of the flesh, but those who are according to the Spirit, the things of the Spirit.

Rom 8:6  For the mind set on the flesh is death, but the mind set on the Spirit is life and peace

Rom 8:13  for if you are living according to the flesh, you must die; but if by the Spirit you are putting to death the deeds of the body, you will live.

Gal 3:3  Are you so foolish? Having begun by the Spirit, are you now being perfected by the flesh?

Gal 4:29  But as at that time he who was born according to the flesh persecuted him who was born according to the Spirit, so it is now also.

Gal 5:16  But I say, walk by the Spirit, and you will not carry out the desire of the flesh.
Gal 6:8  For the one who sows to his own flesh will from the flesh reap corruption, but the one who sows to the Spirit will from the Spirit reap eternal life.

Phi 3:3  for we are the true circumcision, who worship in the Spirit of God and glory in Christ Jesus and put no confidence in the fle

Grace and Peace to you according to the "Finished Work"