Why such a knee-jerk reaction when you could just read the Book of Acts and learn about the transition that was taking place then?
I invite you to read Hebrews.
Tell me, were folks like Abel, Enoch, Noah and Abraham and the gentile harlot Rahab Elect/Jews?
The point being, is that Dysfunctionalism has this perverted fetish over ethnic Jews, raising the enemies of Jesus Christ to an exalted position over the rest of the human race. This template, when applied to the whole of Scripture produces some of the most heretical, blasphemous and demonic dreck since it pretends to operate out of the Scriptures when it fact it viciously attacks it from all angles.
The blasphemer who generated the article in question starts off by arrogantly claiming to "debunk Calvinism" by inventing out of thin air a redefinition of "elect" that no one else holds. For thousands of years there hasn't been a question of who is meant by the "Elect". In fact, for as long as I have been aware, the Free Will Cabal that hates God's Sovereignty and wishes to devolve and deconstruct the Doctrines of Grace and Mercy into nothingness, have long claimed that "elect" is something God does after He looks down the Tunnel Of Time and sees you raising yourself from your own spiritual death and setting aside the natural enmity to claim a saving faith in Christ.
Even those in the American Religion who reject the Doctrines of Grace ought to be offended at this man's thoughts. For the author has turned "election" into a DNA feature and completely removed it from its proper domain, and that being a description of all those who have faith in Jesus Christ our LORD - regardless of how you believe that one comes to faith.
"Election" has never been the exclusive domain of genetic/ethnic Jews especially when one reads Hebrews 11 and sees that there are those who lived thousands of years before the first "Jew" was born who were elect by God's Grace.
You are correct to some degree about the grafting in of "men of every nation" into the tree of faith of Abraham. Rahab the harlot was a Gentile who believed by Grace and became part of our LORD's human ancestor's. How about the Samaritan women (John 4) she was pre-Pentecost, or the Centurion of Luke 7 who our LORD declared "I have not found such grea faith, not even in Israel"? The Canaanite woman who found our LORD in Mark 7:24-30 is declared by Jesus as "Great is your faith!". The OT even gives instructions on how a non-Jew can be a proselyte and be counted a part of the People of God.
The river that flows from Ezekiel's Temple in Ch.47, and again by John in Ch.22 of the Revelation refers to the Gospel going out to all the world beginning with the Jews (Ro 1:16 confirms). It is that expansion and increase of the River that is what it appears that you are appealing to in your references in Acts.
By beginning his article with outright slander and lies against the American Religion's regular Bogey Man John Calvin, going on for paragraph after paragraph of belligerent lies and unsubstantiated claims, then wresting Scripture that is reminiscent of The Garden, then conveniently leaving out the many passages that would immediately debunk his entire arrogant and profane rant in the most obvious and plain language, the author presented himself as an enemy of God and of the Faith.
What was far more important is this fetish worship of Christ Haters at the expense of the entire body of Scripture. He is a man that rejects the Authority of the Scriptures and attacks the People of God.
A 'perverted fetish' is attempting to replace Israel. Attempting to take the promises given to Israel as someone else's and believing that The Church the Body of Christ is Israel. While denying the power of God's love and grace given to us freely during this dispensation of the grace of God. Where we are given equal standing before Him purely on the basis of Christ's finished work.