Here is one of the main... reasons why the Hyper-Dispensationalist movement is so blatantly false.
John Darby with his theory of Dispensationalism separated Christ's Church from Christ's future restoration of the kingdom of Israel. They even created TWO SEPARATE GOSPELS out of Darby's Dispensationalist theories, one for the seed of Israel, because Peter was sent to preach The Gospel to the circumcision, and another Gospel to the Gentiles to whom Apostle Paul was sent to.
However, per Acts 9, even the very words of Lord Jesus, He said He chose Apostle Paul to preach The Gospel to the Gentiles, and ALSO... to the kings, and... to the children of Israel. That means ONE Gospel for both Israelite and Gentile, not TWO separate Gospels like Hyper-Grace falsely teaches.
The whole movement is actually Darby's design of his personal Dispensationalist theories to help support his preaching of a false Pre-trib Rapture theory.
The big... big problem with his theory though, is how MANY of the "children of Israel" have accepted Jesus of Nazareth as The Christ, their Savior, and thus are part of Christ's Church, which means joined WITH believing Gentiles.
And that Israel would inherit the believing Gentiles is... a major doctrine first prophesied in the Old Testament Books of the prophets, especially in the Book of Isaiah.
That means Christ's Church of BOTH believing Israelite, and believing Gentile, together, will make up Christ's future Kingdom on earth when He returns, in the holy land. This is even why the Zechariah 14 Chapter reveals that Christ brings all... His saints with Him to the Mount of Olives east of Jerusalem when He comes. That is where the new Jerusalem, the "beloved city" of Revelation 20 will be located, on earth, as written. And that is where Lord Jesus with His elect priests will reign over all nations from when He returns.