Scripture may not be precisely clear to the nth detail degree about the matter.
However, SOME things ARE clear:
1. Salvation is through the Blood of Christ--the ultimate Sacrifice etc. etc. etc. etc. for every, any and all for all time.
2. HOW God manages that for the blood Children of Jacob alive in these END TIMES is not crystal clear.
3. THAT HE WILL is also crystal clear for those with eyes to see and ears to hear. Whether it's 'merely' the 144,000 prophesied about or those PLUS unnumbered others or whatever such is unclear . . .
4. Joel Rosenberg speaks of 7,000 or so Messianic Jewish Believers in Israel now . . . and likens it to the 7,000 prophets who had not bowed their knee to Baal when the major prophet was whining that he was alone faithful to God.
5. It IS clear that at a given point--evidently right after the Abomination of Desolation--when the AC sets up his image in the 3rd [currently still to be built] Jewish Temple--WHEN the Jews realize they've been hoodwinked by the supreme false messiah--THEN THEY WILL LOOK UPON HIM WHOM THEY HAVE PIERCED and recognize their true Messiah.
6. At least that's the most plausible scenario I can glean from Scripture. Certainly God is drawing many Jews to Himself even now as the growing body of Messianic Believers attest.
7. Certainly the EVERLASTING PROMISES to the children of Jacob ARE OPERANT--AS GOD HIMSELF DELCARED--as long as there are stars, sun, moon . . . THAT includes the LAND. And the boundaries of Israel have NEVER YET been as large as GOD PROMISED they would be.
8. To even imagine that THE GOD OF ISRAEL would not fulfill His promises to His Buddy Abraham to the nth degree shows gross ignorance about God Almighty. Such gross ignorance as to bring into question the quality of the relationship between the doubter of that and God.
Thank you very much. It wearies me as well.
The purpose of the various dispensations is not to set forth two or more "plans of salvation."
The purpose of the dispensations is to demonstrate that no matter what conditions and what rule fallen man is placed under by a benevolent and merciful God, without Jesus Christ, man is an UTTER FAILURE.
Thanks for sharing your insight, dear brother in Christ!