Let me make sure im understanding you.
You are saying that JOHN< who wrote the Gospel of John and 1-3 John, is a "mono" Theist.
And this is the same who stated that the "Word was God", and we read that "the WORD became Flesh, and dwelt among us".
So, if "The Word was God and The WORD was with God"... (KJV) ..according to John, and if this is referring to GOD.....Himself... then when "God was Manifested in the Flesh"... as "The WORD became Flesh, and dwelt among us".. then according to "mono" theism... God just left Heaven, and became a Man, so, I guess God's Throne, was empty for 33+ Years while He was down here.
But lets look at it another way.
We see that JOHN, the Apostle, has credited/explained that = "the Word was God"... "and The Word was WITH God". ... John 1 (KJV)
Now i'll ask you a question, and then i'll answer it here for the readers, and this way, we can end our discussion.
Now... Do YOU believe that GOD, made the world. ???
And im talking about the spinning Green Globe that you are standing on that is Traveling around the Sun.
And you will say....>>"Yes God made the world".... (if your thinking is correct.)
So, if GOD made the world (the Earth)... then notice another verse that John Wrote in the same Gospel were He Identified "The Word was God, and was WITH God'... (John 1).
Look at John 1:10........10 verses later... = after John said.. "was God and was with God". (KJV)
John says, in verse 10.......that : """""Jesus was in the world and the World was MADE... BY... HIM.."""" (KJV).
""""MADE... by HIM""""">...... So, Who is that? = that is the one who "MADE the WORLD".
And John identifies "HIM" by name as : "JESUS">. = "who made the WORLD".
So, we see that the one who "made the world" .... = "WAS God, and was with God"...= John 1
This is the Apostle JOHN who teaches that """Jesus made the WORLD"""".. and he should know.