ARE PEOPLE STILL GENTILES AFTER ENTERING CHRIST BY FAITH?
Answer: No. And here is why.
First, we become a new creature in Christ.
"Therefore, if anyone is in Christ, he is a new creation; old things have passed away; behold, all things have become new." II Corinthians 5:17 NKJV
Second, we do not graft into the Levitical priesthood of Moses, but into the Melchizadek ((מלכּי־צדק = Mlky-Sdq = Melkiy Sadeq [pronounced Mel-keh Sah-dek]) Regal Priesthood of our New Covenant Messiah. (See Hebrews chapter 7).
It is from within this "better" Covenant and Regal Priesthood globally (not just circumferenced by the small land of Judea), we Messianist will oversee and judge the twelve tribes of Israel according to the Holy Bible.
Hebrews 7:11-12, "If therefore perfection were by the Levitical priesthood, (for under it the people received the law (torah),) what further need was there that another priest should rise after the order of Melchisedec (Melkiy Sadeq), and not be called after the order of Aaron? For the priesthood being changed, there is made of necessity a change also of the law (torah)."
Matthew 19:28, "And Jesus (his Hebrew full name is Yahwashag) said unto them, Verily I say to you, That you which have followed me, in the regeneration when the Son of man shall sit in the throne of his glory, you also shall sit upon twelve thrones, judging the twelve tribes of Israel."
Third, the grafting of us into the root and stock of the bodily tree of Judah, mentioned by Paul, is directed to Gentiles before entering Christ. Who, after grafted, do replace the branches of Jews, Judah's, or Israeli body who were "broken off" the Olive tree (from God), allegory, from Romans 11:17. This distinction as being "grafted" or formerly foreign, afterward disappears. This is because it becomes, they become, the same union to the root of Biblical holiness from God and its monotheism, which replace in us, just like the good standing Old Covenant Jews, it replaces in us the unholy sin, idolatry, polytheism, atheism, etc.
"For if the firstfruit is holy, the lump is also holy; and if the root is holy, so are the branches." Romans 11:16 NKJV.
Romans 8:23, "And not only they, but ourselves also, which have the firstfruits of the Spirit"
"Of His own will He brought us forth by the word of truth, that we would be a type of firstfruits of His creatures." James 1:18 NKJV.
Fourth, as it gets into Hebrew roots and word meanings that define us and our identity in Christ (our Hebrew Messiah).
We Judeo-Christians (Messianists) arise from Christ (the Messiah) and therefore from the tribe of Judah.
See Hebrews 7:14, "For it is evident that our Lord sprang out of Judah; of which tribe Moses spake nothing concerning priesthood."
The Hebraic English term "Judah" comes from the Hebrew word יהוּדה = Yhwdh= Yahwadah, which means celebrating Yahwah from following Yahwah.
The English term "LORD" in the English Holy Bible often is used to overlay and represent the underlying Hebrew word יהוה = Yhwh= Yahwah.
The term "Jew" (2 Kings 16:6) comes from the Hebrew word: יהוּדי =Yhwdy = Yahwadiy (pronounced Yah-wah-dey), meaning one of the Yahwah following celebrants, or a follower of Yahwah (Psalm 68:4), from the tribe of and member of Judah (Yahwadah).
Yes, we Judeo-Christians (Judeo = of Judah Christians [ Messianists]) are the tribe of Judah today having entered the New Covenant as prophesied.
See Hebrews 8:8-9, "For finding fault with them, he said, Behold, the days come, says the Lord, when I will make a new covenant with the house of Israel and with the house of Judah: Not according to the covenant that I made with their fathers in the day when I took them by the hand to lead them out of the land of Egypt; because they continued not in my covenant, and I regarded them not, says the Lord." Jeremiah 31:31.
For more about original Bible Hebrew, called Hashwar Hebrew, as used for these translations, see the following links.
https://www.facebook.com/groups/lionofjudahseminary/permalink/707816511505751/?mibextid=Nif5oz
https://judeochristianity.quora.com/HELLENIZATION-OF-HEBREW-AND-ITS-SELF-PRESERVATION-OVERVIEW-ORIGINAL-HEBREW-HAS-NO-VOWEL-LETTERS-HEBREW-FROM-PHOENICIAN?ch=15&oid=124402087&share=e9cba83c&srid=uqCrOt&target_type=post
https://ccgjgcc.home.blog/2020/11/07/the-hebrew-name-of-jesus/