The whole OT is based on inequality with the Israelites being "The chosen People".
Even in the NT, Jesus only changes his mind after the resurrection that he is the savior to all mankind and not only Israel.
Yes and no.
Israel is SYMOBLICALLY the "chosen people" but others became a part of
Israel and the chosen as well. Moses married outside of the Jews, and Jesus
genealogy has quite a few Gentiles. Jesus enraged the Jews by saying that
only two people were helped in the days of Elias, both were Gentiles.
David, Isaiah, Zechariah, Daniel and many others spoke of the Messiah as
coming to his own people, but that His message will go out into all the world.
Jesus came "only" to his own people - that was His mission. Though we read
of quite a few Gentiles receiving that message. But as even Jacob mentioned,
ca 2000 BC, with the end of Israel comes the Messiah and he will be believed
upon by all the world.