Genesis 12:1-3 And the Lord said to Abram, Go forth out of thy land and out of thy kindred, and out of the house of thy father, and come into the land which I will shew thee.[2] And I will make thee a great nation, and I will bless thee and magnify thy name, and thou shalt be blessed.
[3] And I will bless those that bless thee and curse those that curse thee, and in thee shall all the tribes of the earth be blessed.
Not good news for those gentiles, either.
Jesus said Abraham saw the days of Christ - saw His sacrifice for all mankind in John 8. I believe Him.
Paul says that the same Gospel we have - was preached to Abraham Gal 3:8 -- I believe him.
Peter says that the prophets of old were given our same Gospel -- I believe him.
1 Peter 1:
Which verse in John 8 says Abraham saw Ιησους' sacrifice for all mankind?
Are you reading-in what isn't there? Because I don't think Abraham saw more than this:
Genesis 3:15 And I will put enmity between thee and the woman and between thy seed and
her seed, he shall watch against thy head, and thou shalt watch against his heel.LXX
Revelation 13:8 And all that dwell upon the Earth shall worship him, whose names are not written in the book of life of
the Lamb slain from the foundation of the world.
Matthew 26:26-28 And as they were eating, Ιησους took bread and blessed it, and brake it and gave it to the Disciples, and said, Take, eat; this is My body.[27] And He took the cup and gave thanks, and gave it to them, saying, Drink ye all of it:[28] for this is My blood of the New Covenant, which is
shed for many for the remission of sins.
Your 1 Peter 1 verse is a paraphrase of Matthew 13:16-17... regarding the audience...
As someone here said, there are many verses of good news.
------Obviously, not all good news is good news for all people.
(1) The gospel to the gentiles, the Acts of the Apostles 15:20, 1 Corinthians 15:1-8.
(2) The Gospel of the Kingdom for the 10-tribes, Matthew 5:17-20, Matthew 7:24-25,
Matthew 10:5-7, Matthew 24:14, Revelation 11:15.
(3) Revelation 14:6-7 And I saw another angel fly in the midst of heaven, having the Everlasting Gospel to preach unto them that dwell on the earth, and to every nation and kindred and tongue and people,[7] Saying with a loud voice, Fear God and give glory to him for the hour of His judgment is come, and worship Him that made heaven and earth and the sea and the fountains of waters.
(4) Exodus 12:21-27 [27] This passover is a sacrifice to the Lord, as He defended the houses of the children of Israel in Egypt, when He smote the Egyptians, but delivered our houses.LXX
(5) Proverbs 25:25 As cold waters to a thirsty soul, so is good news from a far country.
(6) Isaiah 40:9 O thou that bringest glad tidings to Zion, go up on the high mountain; lift up thy voice with strength, thou that bringest glad tidings to Jerusalem; lift it up, fear not; say unto the cities of Juda, Behold your God!LXX
(7) Isaiah 43:1-4 And now thus saith the Lord God that made thee O Jacob, and formed thee O Israel, Fear not: for I have redeemed thee, I have called thee by thy name, thou art Mine. ...[4] Since thou becamest precious in My sight, thou hast become glorious, and I have loved thee: and I will give men for thee, and princes for thy life.LXX
(8) Isaiah 52:7 (I am present,) as a season of beauty upon the mountains, as the feet of one preaching glad tidings of peace, as one preaching good news: for I will publish thy salvation, saying, O Sion, thy God shall reign.LXX
(9) Isaiah 61:1 The Spirit of the Lord is upon Me, because he has anointed Me; He has sent me to preach glad tidings to the poor, to heal the broken in heart, to proclaim liberty to the captives, and recovery of sight to the blind;LXX
(10) Joel 2:31-32 The sun shall be turned into darkness and the moon into blood, before the great and glorious day of the Lord come.[32] And it shall come to pass that whosoever shall call on the name of the Lord shall be saved: for in mount Sion and in Jerusalem shall the saved one be as the Lord has said, and they that have glad tidings preached to them, whom the Lord has called. Joel 3:1-2.LXX
(11) Jeremiah 20:15 Cursed be the man who brought the glad tidings to my father, saying, A male child is born to thee.LXX