What did the prophets prophesy concerning Israel?
The prophets were dealing with God, prophesying concerning Israel and the coming of their Messiah. They spoke of covenant promises made to Abraham, Isaac, and Jacob. Not a word indicated that Gentiles were to receive any of Israel's blessings.
Les teaches that all the prophets were dealing with God, prophesying things concerning Israel and the coming of their Messiah. He explains that Jesus' statement about not taking the children's bread and casting it to dogs illustrates this principle: the children are Israel, the dogs are Gentiles. Because it was covenant ground, the blessings belonged only to the offspring of Abraham. Jesus came to fulfill the covenants made to Abraham, Isaac, and Jacob, so He could not give Israel's blessings to Gentiles. Les also points to Psalm 23, where the Lord sets a table before His own.