Amillennialism is an ugly distortion of the gospel - it rejects the idea of Jesus literally returning to establish His kingdom, and ruling over the earth from Jerusalem.
It systematically tries to pull up the "natural olive tree" by its roots and replace it with something artificial.
Allow Romans 11 and the testimony of the Prophets to shape your perspective. Don't be arrogant or dumb!
I do not want you to be ignorant of this mystery, brothers, so that you will not be conceited: A hardening in part has come to Israel, until the full number of the Gentiles has come in. And so all Israel will be saved, as it is written:
“The Deliverer will come from Zion;
He will remove godlessness from Jacob.
And this is My covenant with them
when I take away their sins.”
Regarding the gospel, they are enemies on your account; but regarding election, they are loved on account of the patriarchs. For God’s gifts and His call are irrevocable.