How do Gentiles receive the blessing of Abraham now that Israel has failed?
Gentiles now receive the blessing of Abraham directly through the Lord Jesus Christ, not through Israel. Because Israel rejected the Messiah and forfeited its role as a kingdom of priests and go-between, God went straight to the pagan world with the message of salvation, without Israel as an intermediary. Gentiles need not wait for Israel or a Jewish messenger.
Les explains from Galatians 3:14 that the blessing of Abraham comes to the Gentiles, but not through the nation of Israel. Israel fell out of the picture when she rejected the Messiah; she also rejected the opportunity to be a Kingdom of Priests to the Gentile world. Back at Exodus chapter 19, God told Israel that if they were obedient, He would make them a Kingdom of Priests. Every Jew could have been a go-between between the Gentile world and their God. But Israel blew it and dropped the ball. Yet that did not stop God. Paul can now write that Gentiles have received the blessing of Abraham, not through Israel, but directly through the Lord Jesus Christ, immediately. Gentiles do not have to wait for Israel to get her act together, nor wait for a Jew to come to their community and give them the knowledge of God. God did something totally different: He went straight to the pagan world with the message of salvation without Israel as a go-between.
That the blessing of Abraham might come on the Gentiles through Jesus Christ; that we might receive the promise of the Spirit through faith.
More Questions
Does the blessing of Abraham come to the Gentiles through Israel or directly through Jesus Christ?
The Gentiles receive the blessing of Abraham not through the nation of Israel but directly and immediately through the Lord Jesus Christ, so Galatians 3:14 should not be read as saying it comes 'through the nation of Israel.'