If you are a Christian, you have been grafted into Israel. Jesus was a Hebrew, a Jew = God's chosen people. You cannot be a true Christian without knowing and accepting this. For Christ lived among his own kind, his people and he died and was resurrected for them. Isn't everyone on earth God's creation? Yes, but only some are called, chosen and faithful ~ "those he predestined, he also called, those he called, he also justified, those he justified, he also glorified," Romans 8:30. The Lord God Jesus Christ decides. His mercy and grace are not for our giving out but His.
In Isaiah we read, "Who else has held the oceans in his hand? Who has measured off the heavens with his fingers? Who else knows the weight of the earth or has weighted the mountains and hills on a scale? Who is able to advise the Spirit of the Lord? Who knows enough to give him advice or teach him? Has the Lord ever needed anyone's advice? Does he need instruction about what is good? Did someone teach him what is right or show him the path of Justice? No, for all the nations of the wold are but a drop in the bucket. They are nothing more than dust on the scales. He picks up the whole earth as though it were a grain of sand. All the wood in Lebanon's forest and all Lebanon's animals would not be enough to make a burnt offering worthy of our God. The nations of the world are worth nothing to him. In His eye they count for less than nothing... mere emptiness and froth.
To whom can you compare God? What image can you find to resemble him? Can he be compared to an idol formed in a mold, overlaid with god and decorated with silver chains? Or if people are too poor for that, they might at least choose a wood for a skilled craftsman to carve an image that won't fall down. Haven't you heard? Don't you understand? Are you deaf to the words of God, the words he gave before the world began? Are you so ignorant? God sits above the circle of the earth.
The people below look like grasshoppers to him! He spreads out the heavens like a curtain and makes his tent from them. He judges the great people of the world and brings them all to nothing. They hardly get started, barely taking root, when he blows on them and they wither. The wind carries them off like chaff. To whom will you compare me? Who is my equal? asks the Holy One. Look up into the heavens, Who created all the stars? He brings them out like an army, one after another, calling each by its name, because of his great power and incomparable strength not a single one is missing.
O Israel how can you say God ignores your rights? Have you never heard? Have you never understood? The Lord is the everlasting God, the Creator of all the earth. He never grows weak or weary. No one can measure the depths of his understanding. He gives power to the weak and strength to the powerless. Even youths will become weak and tired and young men will fall in exhaustion. But those who trust in the Lord will find new strength. They will soar high on wings like eagles. they will run and not grow weary, they will walk and not faint" ~ Isaiah 40: 12-31.