I don’t get any of this and I’m not sure why it’s important. For one thing, there’s the statement to the effect that God has no active plan for the Jews because they’ve rejected Christ as the Messiah? I’m quite sure that there are Jews all over the world who convert to Christianity every day of every week of every year. Isn’t that “part of the plan”? I’m not trying to be obtuse; it’s simply an issue I’ve never researched or really been exposed to notwithstanding my lifelong, heartfelt beliefs and active participation in an Orthodox Christian community.
Your analysis is correct. The Jews’ future is tied to faith in God by Messiah Jesus, and their being regrafted into the people of God along with believing gentiles, which now goes under the identity of the Church. This has been the view of the Church for 2000 years.
This article is intended to exposes the dispensation error; that there is a future for the Jews apart from the new covenant Church. In fact, the most interesting part of their future happens after the Church is "raptured" from the earth, just before the second coming.