Whoever believes in Him is not condemned, but whoever does not believe stands condemned already because they have not believed in the name of God’s one and only Son. John 3:18
Some folks believe Jews are saved because they’re Jews. I don’t see how an unbeliever has salvation.
A couple of things...
First of all, take that Bible (mis-) translation and throw it in the garbage where it belongs.
Jesus is NOT "God's one and only Son".
In scripture, Christians are called "sons of God":
"Behold, what manner of love the Father hath bestowed upon us,
that we should be called the sons of God: therefore the world knoweth us not, because it knew him not." (I John 3:1)
Similarly, in scripture, angels are called "sons of God":
"Now there was a day when
the sons of God came to present themselves before the LORD, and Satan came also among them." (Job 1:6)
Far from being "God's one and only Son", in reality, Jesus is "the only begotten Son of God", and he was "begotten" on the day in which he was raised from the dead.
"He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of
the only begotten Son of God." (John 3:18)
Acts chapter 13
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26] Men and brethren, children of the stock of Abraham, and whosoever among you feareth God, to you is the word of this salvation sent.
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27] For they that dwell at Jerusalem, and their rulers, because they knew him not, nor yet the voices of the prophets which are read every sabbath day, they have fulfilled them in condemning him.
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28] And though they found no cause of death in him, yet desired they Pilate that he should be slain.
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29] And when they had fulfilled all that was written of him, they took him down from the tree, and laid him in a sepulchre.
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30]
But God raised him from the dead:
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31] And he was seen many days of them which came up with him from Galilee to Jerusalem, who are his witnesses unto the people.
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32]
And we declare unto you glad tidings, how that the promise which was made unto the fathers,
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33]
God hath fulfilled the same unto us their children, in that he hath raised up Jesus again; as it is also written in the second psalm, Thou art my Son, this day have I begotten thee.
It was when Christ was "begotten" and had ascended back to the Father in heaven that he "received by inheritance a more excellent name than they", with the "they" being angels, and when he was "made heir of all things".
Hebrews chapter 1
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1] God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets,
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2] Hath in these last days spoken unto us by his Son,
whom he hath appointed heir of all things, by whom also he made the worlds;
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3] Who being the brightness of his glory, and the express image of his person, and upholding all things by the word of his power, when he had by himself purged our sins, sat down on the right hand of the Majesty on high;
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4]
Being made so much better than the angels, as he hath by inheritance obtained a more excellent name than they.
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5]
For unto which of the angels said he at any time, Thou art my Son, this day have I begotten thee? And again, I will be to him a Father, and he shall be to me a Son?
It is also when Christ was "begotten" that the priesthood changed:
Hebrews chapter 5
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1] For every high priest taken from among men is ordained for men in things pertaining to God, that he may offer both gifts and sacrifices for sins:
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2] Who can have compassion on the ignorant, and on them that are out of the way; for that he himself also is compassed with infirmity.
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3] And by reason hereof he ought, as for the people, so also for himself, to offer for sins.
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4] And no man taketh this honour unto himself, but he that is called of God, as was Aaron.
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5]
So also Christ glorified not himself to be made an high priest; but he that said unto him, Thou art my Son, to day have I begotten thee.
It is our belief in the exalted name of Jesus which he received after her was "begotten" or raised from the dead that saves us.
Second of all, and to your point, no Jew or Gentile can be saved without such saving faith in the exalted name of Jesus which he received after he was "begotten" or raised from the dead.