I have already provided a number of texts from Isaiah where God calls Israel his servant and places her in the role of being responsible to be a light to the blind.To be a light to the nations, to teach the truth about the gospel is not denied (Acts 10:43; Heb. 4:2). Romans 2 simply makes it THEIR CLAIM they are a light to the blind, a teacher.
In case you have forgotten:
From Isaiah 41:
But you, Israel, My servant,
Jacob whom I have chosen,
Descendant of Abraham My friend,
You whom I have taken from the ends of the earth,
And called from its remotest parts
And said to you, 'You are My servant,...
And then in the very next chapter:
Behold, My Servant, whom I uphold;
My chosen one in whom My (D)soul delights
..........
6"I am the LORD, I have called You in righteousness,
I will also hold You by the hand and watch over You,
And I will appoint You as a covenant to the people,
As a light to the nations, ...
This is what it is - a clear statement that God has appointed Israel as his servant and that here role is, yes, to be a light to the nations.
So it is not simply the case that the Jews claim such a role - God has given it to them.
And we can add Romans 3:2
Then what advantage has the Jew? Or what is the benefit of circumcision? 2Great in every respect. First of all, that they were entrusted with the oracles of God.
To be "entrusted" with something is to be given that thing for the sake of others. When a parent dies, sometimes the inheritance is placed in a trust fund for the children. This means that that money is given to some responsible third party to be managed until the children are old enough to manage the money themselves.
It is clear beyond question, from this text in Romans 3, and from old Testament texts like the ones I have provided from Isaiah that, indeed, Israel was given a responsibility, as God's servant, to be a light to the nations.
Are you really going to deny this, Dr. W? Are you going to deny that God gives Israel a role, a responsibility, a task to be the light of the nations?