You said — “I’m a Christian Zionist, but a Catholic. I believe (personally, this is not a Catholic doctrine!) that our ‘older’ brothers and sisters, while wrong on Christ, will get the chance to see the error of their ways on Judgment Day. They are God’s chosen people, with whom he had a convenant. I doubt God plans to go back on his word.”
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Well, this might be a little bit misleading or prone to misunderstanding. In fact, I’m not exactly sure what you mean by — “will get the chance to see the error of their ways on Judgment Day.”
From what I see, the Jews (the remnant) will all accept Jesus as the Messiah of Israel and all be saved on the return of Christ to the earth. That is what Paul says about all Israel being saved. That’s at the end of the Tribulation period, at which time Jesus Christ sets up His Millennial reign of the Kingdom, here on earth.
Now, if you’re referring to this point in time as “Judgment Day”, then I’m not sure you’re quite right. It doesn’t seem like Judgment Day, although there will be the separating of the Sheep from the Goats at that time. But, that’s not quite Judgement Day.
What I think of Judgment Day is the Great White Throne Judgment of Revelation 20. And that’s still long into the future, from when Christ returns to this earth.
Also, it is important to realize that without Jesus Christ as one’s savior, that “chosen people” or not, Jew or not, they will not (individually) get any second chance at the Great White Throne Judgment. Those who have died without Christ (or without the faith of Abraham, as described by Paul, prior to the time of Christ on earth) — will die being “lost”. And that’s true for all, Jew or Gentile...
By Judgement Day, it will be too late. What they do with Jesus while they’re yet alive is what counts toward their salvation. I wish they would be saved and I pray for the peace of Jerusalem every time I think of the Jews. God loved them no matter what. I’m reading Judges now and am amazed at how He continually rescues them after they did evil in God’s sight. That’s how much He loves them, then and now.
I think we’re saying similar things, with you being much more eloquent.