It is bait in the sense that it is asking Christians to judge others. It is entirely up to God to save or not save people who do not accept the Christ born in Bethlehem. But it is not bait in the sense of asking Christians to think about who God is, about God's mercy, about the relationship God wants us to have with His chosen people, about how much we can depend on God's promises.
Before God came to earth as a man, the Jews were saved in sleep, and that was through Christ. Blood was given on the altar for the salvation of man and we know that blood was the blood of Christ. The saintly Jews accepted that.
It is an eternal truth that no one has ever achieved eternal life except through the blood of Christ and that truth has been a truth ever since Adam and Eve disobeyed. If God saves the Jews today, God is doing it through what Christ did. But we are human and we do not know the mind of God. If God feels their acceptance of all He is, even that God will send a Messiah, is enough, then it is God who would do that, we are not to decide.