Will God finish and fulfill His covenant promises with Israel?
Yes. The covenant promises given to Abraham were spiritual and heavenly in origin, and although Israel repeatedly broke the covenant, God kept it settled and will never go back on it. He is not through with Israel; He has not finished His covenant promises and will still finish and fulfill them.
Les explains that the covenant promise made to Abraham was spiritual, never left the hands of spiritual beings, and was heavenly in origin. Abraham merely became the subject of it; he could not touch it or change it. Even though his offspring would break it again and again, God kept it settled and will never go back on it. That is why we can say with confidence that God is not through with Israel and has not finished His covenant promises with them. If Israel were off the board, as much of Christendom says, then all the covenants would fall apart. But they will not, because God is not through with Israel, and He is still going to finish and fulfill those covenant promises. Les also notes that God does not use a three-person mediation; God is the mediator, the instigator, and the fulfiller, and He alone is involved.