Do they share the acknowledgement that Jesus Christ is God, and He is their only savior?
Only if they’re Messianic
Verse 28 tells us and we are not surprised most are still rejecting the Messiah
Romans 11:28-33
King James Version
28 As concerning the gospel, they are enemies for your sakes: but as touching the election, they are beloved for the father’s sakes.
29 For the gifts and calling of God are without repentance.
30 For as ye in times past have not believed God, yet have now obtained mercy through their unbelief:
31 Even so have these also now not believed, that through your mercy they also may obtain mercy.
32 For God hath concluded them all in unbelief, that he might have mercy upon all.
33 O the depth of the riches both of the wisdom and knowledge of God! how unsearchable are his judgments, and his ways past finding out!
https://www.biblegateway.com/passage/?search=Romans+11%3A28-33&version=KJV
Did you miss the whole they’re Jewish?