You cite Rom.11:1,2 where it says: "God has not rejected his people whom he foreknew." However, in order to maintain your theological bias, you must ignore the context. The context makes it clear that salvation would not be given to Israel as an "nation" but only to a "remnant," and only to the "ones chosen" as contrasted with "the rest" who were blinded. Paul only held out a hope to "save some from among them" (Rm.11:5-14).
He explicitly said "Although the number of the sons of Israel may be as the sand of the sea, it is the remnant that will be saved" (Rm.9:27). And that natural "Israel" is not "really Israel" (Rm.2:28-29; 9:6-9).
So "only a remnant" of natural Israel will be saved and NOT Israel as a nation. Jews would have to become Christian and accept Christ. John's vision of those on the heavenly Mount Zion revealed the spiritual Israel of God to be 144,000 "bought from among mankind" not "from among the Jews" (Rev.7:4; 14:1,4; 5:9,10; Jas 1:1).
It is clear that the new covenant only includes *individuals* from Israel and NOT the nation as a whole.
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.
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). Replacing natural Israel as God's nation, it becomes a new "Israel" that is "really 'Israel'" (Rm.2:28-29; 9:6-9).
"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
As God's covenant people these natural Jews had the first opportunity to be part of the New Covenant to rule as kings in heaven (Ac 3:25,26; Ro 1:16; Heb 8:7-13). However, as a nation Israel failed to fill up that number (Jn/ 1:10-13; Ac 13:46; Rom. 9:27; 11:7-10). Later, so that the "full number of those sealed" would be completed the invitation was extended to non-Jews (Isa 55:5; Ac 10:44-45; 15:14; Ro 11:25; 15:14; Eph 2:11-13; 3:1-6; Rev. 5:9-10; 7:4). Jews could only get another chance by becoming Christian and accepting Christ. John's vision of those standing on the heavenly Mount Zion with the Lamb revealed the number of this spiritual Israel of God to be 144,000 "bought from among mankind" not "from among the Jews (Rev. 7:4; 14:1, 4; 5:9,10; Jas 1:1).
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 prophecies 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).
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).
From God's standpoint, it is no longer natural descent from Abraham that determines who are Abraham's seed:
"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
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
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).
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).