God gave the land that became Israel to Abraham and his descendants. In your view, the whole history of Israel is meaningless. Guess again. Scripture is being worked out right now, in the Middle East, with Israel at its centre. The reason why the world is hostile to Israel is because the world is hostile to God. The world is hostile to God because it is controlled by the devil.
I underlined the part I disagree with. It's far from accurate. Until the Seed (Christ) appeared, men only had the old covenant to see God working in His people.
When Christ appeared, any promises of God left unfulfilled were completely vetted
in Christ.
This is what Paul meant when he wrote:
Brothers and sisters, let me take an example from everyday life. Just as no one can set aside or add to a human covenant that has been duly established, so it is in this case. 16 The promises were spoken to Abraham and to his seed. Scripture does not say “and to seeds,” meaning many people, but “and to your seed,” meaning ONE PERSON, who is Christ.
If Christ is natural then we have no hope. But He's not. He's spiritual and can now include all who receive Him. All who receive Him, in turn, receive the promises given to Christ.
All includes Jews and Gentiles. No one was replaced. Actually,
all were included in Christ.