Your tagline is nothing more than garden-variety replacement theology which is more Satanic deception,
My tagline is a quote from Paul's epistle to the Galatians. Which is to say, from scripture.
It is those who are of faith who are children of Abraham.
Everyone who knows Christ as Savior are now heirs of Abraham, along with believing Jews.
As Paul revealed in his Epistles, the distinction between Jew and Gentile in the churches only was removed. Jews who accept Christ as Savior are now a part of the Church, will be raptured along with the rest of those who know Christ as Savior, and will not be on earth for the Tribulation, otherwise known as "the time of Jacob's trouble" (Jeremiah 30:7).
And while the covenants God made with Abraham are for the Jewish people only, Christians have been "adopted", so to speak, into being heirs of Abraham along with Jews who have accepted Christ as Savior.