...There is only one God
and only God manifest in the flesh
could be worthy to redeem us
God didn't create another God
The Word became flesh
That is a classic Protestant view of things.
With classic Protestant interpretation.
However God (THEOS in the Greek New Testament) did not leave his throne in Heaven (wherever in the Milky Way Galaxy or the Universe it is) to come to Earth.
Someone else did -- His Son. He had a Son.