Why do many in Christendom believe God is through with the Jews?
Many in Christendom believe God is through with the Jews because they view the Jews as Christ killers who rejected their Messiah. They also point to Israel's dispersion and the destruction of the temple as evidence that God has permanently set Israel aside, a conclusion the context says is not according to Scripture.
Les explains that Paul is rebutting a widespread opinion in Christendom that God is all through with the Jew. The reasoning given is that the Jews were the Christ killers, they rejected their Messiah, and God sent them into dispersion and destroyed their temple. Les notes that even Martin Luther detested the Jews religiously because he felt they had killed the Messiah, but that is not according to Scripture; he was left field on that point. Paul emphasizes that a Jew today is under no different situation than a Gentile so far as God is concerned. Salvation is now offered on the same level playing field: a Jew has no advantage over the Gentile, nor is he disadvantaged. Both are alike, all under sin, all in need of salvation, and there is no difference.