Did God cast off Israel when they crucified the Messiah, or will he still fulfill the covenant promises to Abraham, Isaac, and Jacob?

Les explains that those who claim God is through with the Jew and cast them off when they crucified their Messiah do not know their Bible. The Scripture is adamant that He is still going to come back and fulfill the covenant promises made to Abraham, Isaac, and Jacob. In Jeremiah 31:35-36, God says that if the ordinances of nature—the sun, moon, and stars—depart from before Him, then the seed of Israel will cease from being a nation forever. If heaven above can be measured and the foundations of the earth searched out beneath, then He would cast off the seed of Israel for all they have done. Since that cannot be done, He will never cast aside Israel. Les teaches that although Israel rejected and crucified their Messiah, and Peter could not get them to believe in the early chapters of Acts, God raised up Saul of Tarsus, Paul, and sent him primarily to the Gentiles. Just as there were Gentile exceptions while God dealt with the Jew, individual Jews can be saved in the age of grace. But the church cannot be mixed up with Israel in the tribulation, because that is God’s dealing with Israel, not the church. The tribulation is primarily God dealing with the nation of Israel.