How could Jesus be the Saviour when God says, He is the Saviour?

(Isaiah 43:11)

Through Jesus Christ, God himself became the Saviour of the world. Again, God's Word is true, He is our Saviour for He was in Jesus Christ reconciling the world unto himself (II Corinthians 5:19, John 1:1,10,14).

In Luke 2:11, we see the fulfillment of God’s Word as foretold in the book of Isaiah. God himself came down from heaven to be the Saviour of the world (Isaiah 43:10-12, Matthew 1:23) Therefore, Jesus Christ is the one God and our Saviour as foretold in Isaiah.

This is an excerpt from my book, "Understanding the Trinity, Three Persons vs Three Manifestations. www.google.com will daniels understanding the trinity