Here are my thoughts: http://peacebyjesus.witnesstoday.org/israel-chosenorforgotten.html
“As concerning the gospel, they are enemies for your sakes: but as touching the election, they are beloved for the fathers’ sakes. “ (Romans 11:28)
Anyone who has done much evangelization among the Jewish understands that the former, while the relative remnant who will come to Christ will realize that latter. To the glory of God.
God is beyond clear that He is not finished with His covenant people, He has a plan for them which He will carry out and He has made promises to them which He will fulfill.
The Ezekiel passages in your link are proof positive of God's keeping His Word: God has gathered His people back into their own land, keeping a promise made to them, and has reestablished them as a nation, keeping a promise made to them.
And He will faithfully keep all the promises He made to His chosen people. We already have proof that He will.