Why do most of Christendom reject God's future for Israel?
Most of Christendom rejects God's future for Israel because it has set Israel aside, often from Reformation-era anti-Semitism that accused Israel of being Christ killers and concluded God was through with the covenant nation and gave its promises to the church.
Les explains that Romans 9–11 deals with the nation of Israel: chapter 9 covers Israel's past, chapter 10 looks at Israel today in the age of grace, and chapter 11 reveals what is still ahead. He emphasizes that the largest part of Christendom—including Roman Catholics, Protestants, and many other groups—refuses to accept that God is not through with Israel. Most have set Israel aside. Many back in the Reformation were basically anti-Semitic because they accused Israel of being the Christ killers, and therefore concluded God had turned to the church with all the promises given to Israel because He was through with that little covenant nation. But Les says, don't you believe it. This book is adamant that even though God has set Israel aside for the last 2,000 years, He is one day going to bring them back to the land, as we see He is doing, and pick up where He left off with His covenant people.