But to us there is one God, the Father, of whom are all things, and we in him; and one Lord Jesus Christ, by whom are all things, and we by him. (1 Corinthians 8:6)
This is a wonderful verse in which the words Son and Holy Spirit do not appear, ruling out a triune God. Instead, we read of one God, the Father, from whom are all things, and for whom we exist, and one Lord, Jesus Christ, through whom are all things, and through whom we exist. Christ is called Lord eighty-five times in the KJV. The Lord is One, and Jesus is Lord.
God is Spirit (John 4:24), upholding the universe and everything in it. The Spirit was made visible in the flesh of Jesus Christ, the invisible God made visible to us, and is with us now, sent by Christ the living Lord, who came among us in flesh and blood.
All things are from the Father, and all things are through Jesus Christ, through whom we exist. Father and Son are One God.
God is One.
“Hear, O Israel: The LORD our God, the LORD is one. Deuteronomy 6:4
To you, it was shown that you might know that the LORD is God; there is no other besides him. Deuteronomy 4:35.
I can address these issues but not without offending others. So I will limit myself. But no one has changed their outlook in this thread its just a back and forth loop.
But I can show how "Jesus" testified oneness and the unity in as you state "the Father's as the One Deity"
Jesus performed the Fathers works. He credited the ability to the "Father" in Him.
John 10:37-39 New International Version (NIV)
Do not believe me unless I do the works of my Father. But if I do them, even though you do not believe me, believe the works, that you may know and understand that the Father is in me, and I in the Father.” Again they tried to seize him, but he escaped their grasp.
The disciples asked Jesus to show them the Father.
John 14:8-21
New International Version
8 Philip said, “Lord, show us the Father and that will be enough for us.”
9 Jesus answered: “Don’t you know me, Philip, even after I have been among you such a long time? Anyone who has seen me has seen the Father. How can you say, ‘Show us the Father’? 10 Don’t you believe that I am in the Father, and that the Father is in me? The words I say to you I do not speak on my own authority. Rather,
it is the Father,
living in me, who is doing his work. 11 Believe me when I say that I am in the Father and the Father is in me; or at least
believe on the evidence of the works themselves
That's Jesus and the Father united in one Deity. By that Deity and Jesus credited the Father, He can, like no other before Him nor after Him, like the Father Himself perform the Father's works at "His" will.
Matthew
Jesus Calms the Storm
23Then he got into the boat and his disciples followed him. 24Suddenly a furious storm came up on the lake, so that the waves swept over the boat. But Jesus was sleeping. 25The disciples went and woke him, saying, “Lord, save us! We’re going to drown!”
26He replied, “You of little faith, why are you so afraid?” Then he got up and rebuked the winds and the waves, and it was completely calm.
27The men were amazed and asked,
“What kind of man is this? Even the winds and the waves obey him!”
If you lived in the days of the Son of Man's ministry you could have a conversation with Him, not the Father, and Jesus could speak to you thoughts from His mind.
Likewise the one God exalted to His right hand and the one God put all things under, not meaning God Himself, sat down "with" the Father on His Fathers throne..
Revelation 3:21
New International Version
21 To the one who is victorious, I will give the right to sit with me on my throne, just as I was victorious and sat down
with my Father on his throne.
John 14
13 And I will do whatever you ask
in my name, so
that the Father may
be glorified in the Son. 14 You may ask me for anything
in my name, and I will do it.
Clearly the exalted Jesus and Father are still united in One Deity.
Such unity was also noted before the world began.
Col 1:19
It wasn't the person of the Father on the cross but the one He called His Son whom He loves and in Him God was well pleased.
Colossians 1:19 In-Context
19 For God was pleased to have all his
fullness dwell in him, 20 and
through him to reconcile to himself all things, whether things on earth or things in heaven, by making peace
through his blood, shed on the cross.
I don't find fault in your outlook of one God the Father but in overlooking the person of the Lord Jesus as one who is not the Father. As stated He and the Father are united in
one Deity who Jesus identified as the Father living in Him. And Jesus is the same yesterday today and forever.
Hebrews 13:8
New International Version
8 Jesus Christ is the same yesterday and today and forever.