Once you really get it, that the New Covenant replaced the Old, you’ll never read the Bible the same again. It will become a new book to you.
The Old Covenant, by definition is the law given to Israel under Moses. This is what the New Covenant, established by the blood of Jesus, replaced.
The New Covenant, was promised to the house of Israel and the house of Judah. In the Biblical narrative of the story of Israel, the coming of Jesus Christ (not his second coming, but his first) is the main event! It is the climatic ending of national Israel’s history under the first covenant which held them in bondage under a curse.
The New Covenant was God’s promise to the house of Israel and the house of Judah in the day he would deliver them from their ungodliness.
Salvation for Israel is not somthing in waiting, which hasn’t happened yet. Salvation for Israel has already come in the person of Jesus Christ, and this is why the announcement of Christ takes center stage in the story of Israel.
It was so grand, that God sent John the Baptist to prepare the way for Israel’s redeemer and to make the announcement to Israel that this man is the Son of God: the one we have all been waiting for!
Yet, not all those who were of Israeli descent accepted the message, and just as the Israelites who sinned and rebelled against God under the law were judged, even so those who rejected Jesus were also judged and cut off from covenant with God just as Moses said they would be. ~ See Acts 3:22-23
But there is good news! God is able to graft them in again, if they will believe the gospel. ~ See Romans 11:23
Once you understand that the gospels and the book of Acts belong to the narrative of the story of Israel, the Bible will become a new book to you.
The coming of Jesus was not an intermission in God’s dealings with Israel. The coming of Jesus was the salvation God had promised to Israel by his prophets, who also declared that when Israel was saved, the whole world would be invited into the blessing!
Now I say that Jesus Christ was a minister of the circumcision for the truth of God, to confirm the promises made unto the fathers: And that the Gentiles might glorify God for his mercy; as it is written, For this cause I will confess to thee among the Gentiles, and sing unto thy name. And again he saith, Rejoice, ye Gentiles, with his people. And again, Praise the Lord, all ye Gentiles; and laud him, all ye people. And again, Esaias saith, There shall be a root of Jesse, and he that shall rise to reign over the Gentiles; in him shall the Gentiles trust. ~ Romans 15:8-12
Salvation for the Gentiles is not a dispensational interruption in God’s dealings with the Jewish people. Salvation for the Gentiles was promised to come when God would save his people Israel.
The message of the Kingdom of God is the same for the Jew as it is for the Gentile: Believe on the Lord Jesus Christ!