In your view of Scripture, was there anything like a
faithful OC Jew at the time Christ came to earth, maybe with a zeal towards God as they understood Him?
Is it conceivable to you with your unscriptural view of fallen mankind that there could be a faithful Jew who could have been at first unfaithful to YHWH's Christ until he was persuaded Jesus is YHWH's Christ?
You're so far off base on so many Scriptural truths, that it seems to me you cannot even do basic reasoning let alone the logic
@PaulThomson has been calling you on. There's probably a very personal reason Paul could so clearly see and say with deep, heartfelt care:
NKJ Romans 10:1 Brethren, my heart's desire and prayer to God for Israel is that they may be saved. 2 For I bear them witness that they have a zeal for God, but not according to knowledge. 3 For they being ignorant of God's righteousness, and seeking to establish their own righteousness, have not submitted to the righteousness of God. 4 For Christ is the end of the law for righteousness to everyone who believes.