Isaiah 49:6 says, "And he said, "It is a light thing that thou shouldest be my servant to raise up the tribes of Jacob, and to restore the preserved of Israel: I will also give thee for a light to the Gentiles, that thou mayest be my salvation unto the end of the earth."
Here we see even in the Old Testament, God's love for the Gentiles as well as the Jews. God's love for both is summed up in the above verse. We see Rahab, the harlot, Noah, Naaman, Job, Nebuchadnezzar, and many other Gentiles being selected by God for salvation and service for Him!