When did God turn to the Gentile without Israel?
God turned to the Gentile without Israel at the point when Israel rejected everything and continued in that rejection. This had been kept secret in God's mind, contrasting with the Old Testament program where Gentiles would be reached through Israel.
Les explains that the turning point came when Israel was rejecting everything and continuing to reject it. At that point God did something that had been kept secret in His mind, which no one comprehended: He would turn to the Gentile without Israel. The whole Old Testament program had been that God would reach the pagan, heathen Gentiles through Israel, calling them out, setting them apart, and making them His covenant people so that they could give the Gentiles the knowledge of their Jehovah God.