>>854886
>The webpage where I found all of that CI stuff used Paul's epistles to validate their point
Then in that case go to Acts 13:46-48.
>46 Then Paul and Barnabas waxed bold, and said, It was necessary that the word of God should first have been spoken to you: but seeing ye put it from you, and judge yourselves unworthy of everlasting life, lo, we turn to the Gentiles.
>47 For so hath the Lord commanded us, saying, I have set thee to be a light of the Gentiles, that thou shouldest be for salvation unto the ends of the earth.
>48 And when the Gentiles heard this, they were glad, and glorified the word of the Lord: and as many as were ordained to eternal life believed.
Hopefully that makes sense right away to show, that Biblical Israelites are not the only descendants of man (technically, אִישׁ), who have eternal souls. It is clear that the nations or gentiles are going to be among the saved: that is why we see that in the end times, it is said that the redeemed are out of every kindred, tongue and nation (Book of Revelation 5:9).
>They say how Greeks are actually Israelite and that the verse talks about being no differences between Israelites but non-Israelites aren't included.
That just means they have redefined Israelite to mean something wider than it actually is in Scripture. The Biblical definition of Israelite included those who were part of that nation, and in the New Testament it includes those who are born again and joint-heirs with Christ (as it says via Paul, Rom. 8:17, "And if children, then heirs; heirs of God, and joint-heirs with Christ;").
Obviously we all know that all men go one of two ways from this earth. That's what we learn from Christ in Matthew 25:46 - "these shall go away into everlasting punishment: but the righteous into life eternal." Thus, obviously since Greek, Scythian, Judean, were all descendants of man, possessing eternal souls, it follows that each has a possibility of being saved due to the fact Christ died for them.
The attempt to redefine Israel to encompass all man is simply a problem of redefinition. The part that I mentioned before, however, about "Judaizing," is a much clearer and more definite doctrinal mistake. I know and have seen many CI also try to argue that the old civil laws that the former kingdom of Israel had to follow should still be enforce. This includes things like circumcision or observing the Levitical calendar or ritual purity; things like this. Paul devastates this position in the book of Galatians, so if they admit it, you can pretty much turn straight to Galatians to show how we are not under the law any longer.
Galatians 3:
>22 But the scripture hath concluded all under sin, that the promise by faith of Jesus Christ might be given to them that believe.
>23 But before faith came, we were kept under the law, shut up unto the faith which should afterwards be revealed.
>24 Wherefore the law was our schoolmaster to bring us unto Christ, that we might be justified by faith.
>25 But after that faith is come, we are no longer under a schoolmaster.
Galatians 5:
>3 For I testify again to every man that is circumcised, that he is a debtor to do the whole law.
>4 Christ is become of no effect unto you, whosoever of you are justified by the law; ye are fallen from grace.
>5 For we through the Spirit wait for the hope of righteousness by faith.
>6 For in Jesus Christ neither circumcision availeth any thing, nor uncircumcision; but faith which worketh by love.
All of this is obvious to anyone who is saved as to why "Judaizing," which is the call to observe Levitical law, is a false doctrine. See also:
Colossians 2:
>16 Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath days:
>17 Which are a shadow of things to come; but the body is of Christ.
Hebrews 7:
>26 For such an high priest became us, who is holy, harmless, undefiled, separate from sinners, and made higher than the heavens;
>27 Who needeth not daily, as those high priests, to offer up sacrifice, first for his own sins, and then for the people's: for this he did once, when he offered up himself.
>28 For the law maketh men high priests which have infirmity; but the word of the oath, which was since the law, maketh the Son, who is consecrated for evermore.
Hebrews chapters 7-9 in general (also the book of Galatians) is a good place to go for correcting anything related to Judaizing. Hopefully that helped.