STP never said otherwise.
STP was pointing out that "a covenant for the nations." is NOT in the Bible and is NOT the same as "a covenant of the people, for a light of the Gentiles;"
The stupidity of this post is that belief again that the English version in your hand is going to solve it. You have to know the context and know what the NT says. Christ, whom you don't seem to know, came and did the things mentioned there. He could just as easily read this passage at Nazareth as the other; see for yourselves. He is causing new things to happen, v9.
The song that everyone is to sing in worship of what Christ the covenant does is for the ends of the earth. The Servant who does these things is God himself (ch 43) and is the Messiah who suffers in ch 53. It is not hard at all to see, but you are the most obstinate about this for reasons that only protect a future kingdom in Judea, which is never the interest of Christ or the NT.
God started the mission movement in ch 43 as well. You are my witnesses, twice. This get used by Christ to and about the apostles. Just like Rom 10 is saying as well, that that was the purpose intended to be accomplished in and through Israel to go to the ends of the earth.
On a minor note, the NIV goes with 'for the people' and this belongs with its obvious meaning in hebrews where his body is the one that accomplishes the sacrifice for it.
But you all are famous for blocking the obvious meaning.