It's Gentiles who have been grafted into the blessings of the Jews. Not the other way around. Please learn this lesson
Both Jews and gentiles are grafted into the vine of Israel; there is no difference. Gentiles have been blessed by Israel's/Judah's' preservation of OT scripture for thousands of years and Jews have been blessed by Christian preservation of NT scripture for thousands of years, Please learn this lesson...
And they also, if they abide not still in unbelief, shall be graffed in: for God is able to graff them in again. Romans 11:23