1 John 2:22-24 (KJV)
22 Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son. 23 Whosoever denieth the Son, the same hath not the Father: (but) he that acknowledgeth the Son hath the Father also. 24
The anti-Christ Jew does not have the Father. He is not a member of God's family. Jesus came to his own, but they received him not, but as many as received him, to these gave he power to become the sons of God, to them that believe on his name. Which were born not of blood nor of the will of the flesh, nor of the will of man, but of God." John 1:12-14
If you don't believe that Jesus is the Christ, then you are not a son of Abraham. That promise was made to Abraham and to his seed and that seed is Jesus Christ (Galatians 3:16). If one is not "in Christ", then he is not a child of promise and joint heir with Christ Jesus.
You do err because you do not know the scriptures.
“Jews and Christians do NOT belong to God’s family.”
You are kidding, right?
So you are just going to throw away Romans Chapter 11: Vs 25-27? Interesting.