[one Lord one faith one baptism]

The Church is a light to the nations, it is the Israel of God.
people who reject Jesus will die in their sins and do the will of their father, the devil. such people are a light to no one.

[MrEdd]

God will use whom he pleases to accomplish his purposes. Their cooperation is not required.

Whether or not the Jews in Israel come to a saving faith is irrelevant. That has a bearing on their judgment after death, but none whatsoever on whether or not God can use them to humble the nations.