The Gentiles are a light to the Gentiles? Since when?

You can read in the Bible that the children of Israel will be a light to the Gentiles, but nowhere does it say that the Gentiles will be a light to themselves. This is obviously something that they have made up, so how are they currently supposed to get salvation from the Lord God of Israel?

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The Gentiles are a light to the Gentiles? Since when?

Went to a so called Bible study at a Sunday church and it turned out to just be more pushing of the doctrines of the Europeans, with plenty of mention of hell, but hardly any mention of the good things of God.This is something that the Europeans tend to push, almost as if they do not really like God, which then would not make God pass His joy unto them. The Europeans have turned God's gospel into bad news and Caribbean and African preachers have followed after them. Here is some of the good news that Jesus preached:
Luke 8:1: And it came to pass afterward, that he went throughout every city and village, preaching and shewing the glad tidings of the kingdom of God: and the twelve were with him,
Luke 8:2: And certain women, which had been healed of evil spirits and infirmities, Mary called Magdalene, out of whom went seven devils,
Luke 8:3: And Joanna the wife of Chuza Herod's steward, and Susanna, and many others, which ministered unto him of their substance.
Luke 8:4: And when much people were gathered together, and were come to him out of every city, he spake by a parable:
Luke 8:5: A sower went out to sow his seed: and as he sowed, some fell by the way side; and it was trodden down, and the fowls of the air devoured it.
Luke 8:6: And some fell upon a rock; and as soon as it was sprung up, it withered away, because it lacked moisture.
Luke 8:7: And some fell among thorns; and the thorns sprang up with it, and choked it.
Luke 8:8: And other fell on good ground, and sprang up, and bare fruit an hundredfold. And when he had said these things, he cried, He that hath ears to hear, let him hear.

So no mention of hellfire there and notice that it was glad tidings that He was bringing, so where do the Europeans get their hellfire from?

Luke 9:1: Then he called his twelve disciples together, and gave them power and authority over all devils, and to cure diseases.
Luke 9:2: And he sent them to preach the kingdom of God, and to heal the sick.

Even more good stuff, with still no orders to preach hellfire. I ended up reading through a bit of the New Testament to find these verses and there really is a lack of the mention of hellfire, so Jesus really was there to bring the good news. But the Europeans seem hell bent on bringing bad news about God, almost as if that is what they prefer to say about him. I have been thinking about why the Europeans seem to be in such a huff, with them also trying to bring themselves in when it comes to Bible prophecy as well and it almost seems that they are not happy about God withholding the gifts of the Spirit from them, while they seem to think that they automatically deserve them, mainly due to how clever they think they are, when it comes to working out what the Bible is saying.
The main point that they seem to be missing is that God has never said that the Gentiles would be a light to the Gentiles, but it is the real Israel who are to take that role, not the fake Israel as the Europeans seem to think. We can read that this is the case even in the New Testament in:

Acts 15:12: Then all the multitude kept silence, and gave audience to Barnabas and Paul, declaring what miracles and wonders God had wrought among the Gentiles by them.
Acts 15:13: And after they had held their peace, James answered, saying, Men and brethren, hearken unto me:
Acts 15:14: Simeon hath declared how God at the first did visit the Gentiles, to take out of them a people for his name.
Acts 15:15: And to this agree the words of the prophets; as it is written,
Acts 15:16: After this I will return, and will build again the tabernacle of David, which is fallen down; and I will build again the ruins thereof, and I will set it up:
Acts 15:17: That the residue of men might seek after the Lord, and all the Gentiles, upon whom my name is called, saith the Lord, who doeth all these things.
Acts 15:18: Known unto God are all his works from the beginning of the world.
Acts 15:19: Wherefore my sentence is, that we trouble not them, which from among the Gentiles are turned to God:
Acts 15:20: But that we write unto them, that they abstain from pollutions of idols, and from fornication, and from things strangled, and from blood.

We see here that James is saying that it is the tabernacle of David that will be built up, so that men can seek after it, but this obviously is not talking about the tabernacle of the Gentiles, so how can the Gentiles be the ones that make it seem as if it is their job to bring forth the gospel? God is plainly saying, even in the New Testament, that it is the Israelites who will be handling this job, so it is time for the Gentiles to see sense

Amos 9:8: Behold, the eyes of the Lord GOD are upon the sinful kingdom, and I will destroy it from off the face of the earth; saving that I will not utterly destroy the house of Jacob, saith the LORD.
Amos 9:9: For, lo, I will command, and I will sift the house of Israel among all nations, like as corn is sifted in a sieve, yet shall not the least grain fall upon the earth.
Amos 9:10: All the sinners of my people shall die by the sword, which say, The evil shall not overtake nor prevent us.
Amos 9:11: In that day will I raise up the tabernacle of David that is fallen, and close up the breaches thereof; and I will raise up his ruins, and I will build it as in the days of old:
Amos 9:12: That they may possess the remnant of Edom, and of all the heathen, which are called by my name, saith the LORD that doeth this.
Amos 9:13: Behold, the days come, saith the LORD, that the plowman shall overtake the reaper, and the treader of grapes him that soweth seed; and the mountains shall drop sweet wine, and all the hills shall melt.
Amos 9:14: And I will bring again the captivity of my people of Israel, and they shall build the waste cities, and inhabit them; and they shall plant vineyards, and drink the wine thereof; they shall also make gardens, and eat the fruit of them.
Amos 9:15: And I will plant them upon their land, and they shall no more be pulled up out of their land which I have given them, saith the LORD thy God.

Luke 4:16: And he came to Nazareth, where he had been brought up: and, as his custom was, he went into the synagogue on the sabbath day, and stood up for to read.
Luke 4:17: And there was delivered unto him the book of the prophet Esaias. And when he had opened the book, he found the place where it was written,
Luke 4:18: The Spirit of the Lord is upon me, because he hath anointed me to preach the gospel to the poor; he hath sent me to heal the brokenhearted, to preach deliverance to the captives, and recovering of sight to the blind, to set at liberty them that are bruised,
Luke 4:19: To preach the acceptable year of the Lord.
Luke 4:20: And he closed the book, and he gave it again to the minister, and sat down. And the eyes of all them that were in the synagogue were fastened on him.
Luke 4:21: And he began to say unto them, This day is this scripture fulfilled in your ears.
Luke 4:22: And all bare him witness, and wondered at the gracious words which proceeded out of his mouth. And they said, Is not this Joseph's son?

Isaiah 61:1: The Spirit of the Lord GOD is upon me; because the LORD hath anointed me to preach good tidings unto the meek; he hath sent me to bind up the brokenhearted, to proclaim liberty to the captives, and the opening of the prison to them that are bound;
Isaiah 61:2: To proclaim the acceptable year of the LORD, and the day of vengeance of our God; to comfort all that mourn;
Isaiah 61:3: To appoint unto them that mourn in Zion, to give unto them beauty for ashes, the oil of joy for mourning, the garment of praise for the spirit of heaviness; that they might be called trees of righteousness, the planting of the LORD, that he might be glorified.
Isaiah 61:4: And they shall build the old wastes, they shall raise up the former desolations, and they shall repair the waste cities, the desolations of many generations.
Isaiah 61:5: And strangers shall stand and feed your flocks, and the sons of the alien shall be your plowmen and your vinedressers.
Isaiah 61:6: But ye shall be named the Priests of the LORD: men shall call you the Ministers of our God: ye shall eat the riches of the Gentiles, and in their glory shall ye boast yourselves.
Isaiah 61:7: For your shame ye shall have double; and for confusion they shall rejoice in their portion: therefore in their land they shall possess the double: everlasting joy shall be unto them.
Isaiah 61:8: For I the LORD love judgment, I hate robbery for burnt offering; and I will direct their work in truth, and I will make an everlasting covenant with them.
Isaiah 61:9: And their seed shall be known among the Gentiles, and their offspring among the people: all that see them shall acknowledge them, that they are the seed which the LORD hath blessed.
Isaiah 61:10: I will greatly rejoice in the LORD, my soul shall be joyful in my God; for he hath clothed me with the garments of salvation, he hath covered me with the robe of righteousness, as a bridegroom decketh himself with ornaments, and as a bride adorneth herself with her jewels.
Isaiah 61:11: For as the earth bringeth forth her bud, and as the garden causeth the things that are sown in it to spring forth; so the Lord GOD will cause righteousness and praise to spring forth before all the nations.