When you accept what the Bible really teaches it is easy to see the errors inherent in your questions and comments.
According to the God's Word He rejected natural Israel and brought into being a "Spiritual" Israel made up of Jew and Gentile. This "Israel of God" was now the focus of the Abrahamic Covenant and all other restoration prophecies.
Gal 3:29 says the "seed of Abraham" are made up of all nations who belong to Christ not fleshly Israel (Gal 3:16,29; 6:15,16; Rm 2:28,29; 9:24-27; Eph 2:11-16; Hos 2:23; 1Cor.10:18). Only a few Natural Jews would be saved (Isa 10:21, 22; Ro 9:27).
"There is neither Jew nor Greek, ...for you are all one person in union with Christ Jesus. Moreover, if you belong to Christ, you are really Abraham's seed, heirs with reference to a promise."-Gal.3:27-29
God's Word states: "He is not a Jew who is one on the outside, nor is circumcision that which is on the outside upon the flesh. But he is a Jew who is one on the inside, and his circumcision is that of the heart by spirit." (Rm.2:28, 29; 9:6).
So, from God's standpoint, it is no longer natural descent from Abraham that determines who are Abraham's seed. Replacing natural Israel as God's nation, the congregation of anointed Christians becomes a new "Israel" that is "really 'Israel'" (Rm.2:28-29; 9:6-9; 11:7). As in the case of the Ephesians, who previously had been "alienated from the state of Israel," now non-Jews could be sealed with God's spirit and become His chosen nation (Eph 2:11-13; 3:5, 6; Ac 15:14).
Speaking to the Jewish religious leaders; Jesus said: "This is why I say to YOU, The kingdom of God will be taken from YOU and be given to a nation producing its fruits (Mt.21:42-43).
"Jerusalem, Jerusalem, the killer of the prophets and stoner of those sent forth to her. . .Look! Your house is abandoned to you."-Mt. 23:37,38
The saving of "all Israel" is accomplished, not by conversion of all the Jews, but by the ‘coming in' of people from Gentile nations.
"...a dulling of sensibilities has happened in part to Israel until the full number of people OF THE NATIONS has come in, and in this manner all Israel will be saved." -Rm.11:25, 26
The beliefs of Jehovah’s Witnesses follow the interpretation of Christ and the Apostles in applying the restoration prophecies to the spiritual Israel as the antitypical “12 tribes.”
The clear and irrefutable teaching of the New Testament provides absolutely no fulfillment of these prophecies in the natural Jews or the literal land of Israel but it is always applied to a spiritual "Israel" that is "really 'Israel'" and not a natural Jew (Rm.2:28-29; 9:6-9).
Your interpreting these prophecies as having a fulfillment on the literal Israelites or natural Jews is in complete contradiction to all the explicit Scriptural teachings which show that God has rejected natural Israel.
The only way to maintain your interpretation is to completely ignore all the explicit statement in God's Word that He is NOT using natural Israel.
So your interpretations must be rejected.
The restoration prophecies of Ezekiel, Jeremiah and Isaiah are in line with the prophecies of Christ regarding the complete restoration of True Worship that would come at the "time of the end" (Ac.3:20- 21; 20:29-30; Lk.19:11,12; Mt.25:21-30; 2Thes.2:3-12; 1Tim.4:1; 2Pt.2:1-3).
At "the conclusion of the system of things...the righteous ones would then shine as brightly as the sun" (Mt.13:24-30, 36- 43; 24:45-47; Dan.12:1,3,4,10).
By their biblical beliefs and Christlike actions Jehovah's Witnesses prove that they are fulfilling the restoration prophecy of Ezekiel regarding faithful spiritual Israel. This is the testimony of the Holy Spirit (1Cor. 6:9-11; Gal.5:19-22).