God is Christ and Christ is God.
Israel rejects that the man born in Bethlehem became God, I think we would need to be God to know for certain if rejecting that is rejecting Christ in God.
Jews reject Jesus Christ. They do not believe he is Divine or the Son of God the Father nor that he is the Messiah.
Joh 8:18 I am one that bear witness of myself, and the Father that sent me beareth witness of me.
Joh 8:19 Then said they unto him, Where is thy Father? Jesus answered, Ye neither know me, nor my Father : if ye had known me, ye should have known my Father also.