Romanos 11:19-20

It is true that one of the reasons Gentiles have become partakers of the blessings of the Abrahamic Covenant is that many of the Jews have not believed. Of course, it was always God’s purpose to bless Gentiles (Genesis 12:1-3). However the Gentile believer who may feel superior to the unbelieving Jew needs to remember something. The only reason he is where he is (partaking of blessing from the Abrahamic Covenant) is because he has simply believed God. He is not there because he has done some meritorious work that would be a ground for boasting (cf. Romans 5:2).