You should keep on reading the very next chapter of Isaiah 43:1-5.
It tells of the regathering of Israel and the sacrificing of Egypt, Cush, and Seba.

But now, this is what the LORD says—he who created you, Jacob, he who formed you, Israel: "Do not fear, for I have redeemed you; I have summoned you by name; you are mine. When you pass through the waters, I will be with you; and when you pass through the rivers, they will not sweep over you. When you walk through the fire, you will not be burned; the flames will not set you ablaze. For I am the LORD your God, the Holy One of Israel, your Savior; I give Egypt for your ransom, Cush and Seba in your stead. Since you are precious and honored in my sight, and because I love you, I will give people in exchange for you, nations in exchange for your life. Do not be afraid, for I am with you; I will bring your children from the east and gather you from the west.

Clearly, the regathering of Israel has happened as was prophesied over 2500 years ago. Keep reading the rest of Isaiah. Then re-read the Ezekiel 38 about the destruction of the forces of Gog and Magog. It does not go well for enemies of the Holy One of Israel. It is better to become friends while there is still time.