Preach it Brother!!
The church is the continuation of the true Israel. Paul illustrates this beautifully in the analogy of the cultivated olive tree in Romans 9. The root and trunk (the Abrahamic Covenant) of this tree never changed, the Jews (natural branches) who believed in Christ stayed on the trunk, the Jews (natural branches) who did not believe were cut off, no longer part of the Trunk the Abrahamic covenant. The gentiles who believe(d) are grafted into the trunk the Abrahamic Covenant are rewarded the promises of God. Read Galations 3. The Promise is to Abraham and His Seed (singular, the seed is Christ), not the natural descendants of Ahraham (but only those who had faith as Abraham).
Ahwatukee, are you a son of Abraham?
7 Therefore know that only those who are of faith are sons of Abraham.
26 For you are all sons of God through faith in Christ Jesus. 27 For as many of you as were baptized into Christ have put on Christ. 28 There is neither Jew nor Greek, there is neither slave nor free, there is neither male nor female; for you are all one in Christ Jesus.29 And if you are Christ’s, then you are Abraham’s seed, and heirs according to the promise. It's not a matter of studying more, in which you claim I and others of my persuasion need to do. It's a matter of understanding what you have studied.
Ahwatukee, are you a son of Abraham?
7 Therefore know that only those who are of faith are sons of Abraham.
26 For you are all sons of God through faith in Christ Jesus. 27 For as many of you as were baptized into Christ have put on Christ. 28 There is neither Jew nor Greek, there is neither slave nor free, there is neither male nor female; for you are all one in Christ Jesus.29 And if you are Christ’s, then you are Abraham’s seed, and heirs according to the promise. It's not a matter of studying more, in which you claim I and others of my persuasion need to do. It's a matter of understanding what you have studied.