You are quite right. Jesus clearly cannot logically be the “one God” and at the same time be that God!
At 1Timothy 2.5 Christ is clearly excluded and separated from being the “one God” and is clearly a separate and distinct being.
It explicitly states that Jesus is a "mediator" between *GOD* and men. This separates Jesus from the entity *God* and places him between the Deity and us, not equal with god. Only by ignoring the grammar and arbitrarily re-defining of what the words “mediator” and “between” means can we escape the fact that Jesus cannot be Almighty God.
Also, unless we resort to equivocation on the meaning of "God," the Trinitarian belief is completely destroyed since Christ cannot be separated from the being of "God." "God" to Trinitarians is composed of all three persons combined or the "consubstantial Triad."
The Athanasian Creed states that Trinitarians must not "confuse the persons or divide the substance." In other words, while all share the "substance" God it cannot be separated as can the Father, Son and HS. Since "God" to Trinitarians is composed of all three persons combined, separating "God" from Christ would mean that we have four divine beings: the tri-personal God (Father, Son, HS) is with a fourth–the Logos as a separate entity.
Those who are indoctrinated in the Trinitarian "word magic" will mentally redefine the word "God" in these cases to mean "the Father" or just one of the "persons" instead of the collective Godhead. This is because while the Trinity can separate the Father from Christ it cannot have Christ separated from "GOD." But if Christ were equal to, and the same as Almighty God, he could NEVER be distinguished from *"God"* in any sense.
Trinitarians must resort to the fallacy of equivocation in every scripture which explicitly separates Christ from "God" or their doctrine is destroyed and they reveal themselves as polytheistic.
But, the fact is that in the Scriptures Jesus is repeatedly differentiated from “GOD,” not just the Father. And EVERY TIME Jesus is called "god" the context always shows that Jesus is separated from and less than the Eternal, Almighty God (Jn. 3:35; 5:19,22,25,26; 6:38; 8:16,28,29,42,50,54; 13:16; 14:28; 17:2). It says over a dozen times that he has a God over him *after* he returned to heaven! (Rev.3:2,12).
Scriptures show that Jesus has a God over him at every period of his existence (Mic.5:4; Jn 14:28; 20:17; Rm.15:6; 1Cor 15:28; Rev.3:12). ALMIGHTY God cannot have a God! At the highest position he will ever attain, Jesus is still "subject" to *GOD* the same way we are "subject" to him (1Cor.15:27,28).
In order to escape the obvious teaching of God’s Word, Trinitarians give us metaphysical gobbledegook. Or what has been called by different scholars "distilled nonsense," "literary violence," "literary irrationality" and "a collection of irrelevancies, nonsequiturs and specious sophistries."
For example, they claim that Christ has a "dual nature" and was speaking from his "human side" at some times and from his "God side" at others," sometimes even in the same discourse. How convenient!
Further, in order to appeal to this self-serving argument they must contradict their own creed. The Trinitarian definition of Jesus according to the Council of Chalcedon is: "That he is fully God and fully man UNDIVIDED, INSEPARABLE." Trinitarians cannot maintain this Creed since they must arbitrarily DIVIDE the God and human nature at will (whenever Jesus shown to be the mediator, less than God or he dies).
This desperate and self-serving dual-nature concept is found nowhere in Scripture, but is an inventive theological necessity to protect Trinitarian dogma. It is Trinitarian post-biblical mysticism forced into the text.
In fact, holding a belief that Jesus had a nature other than only "flesh" would make us the deceiver and antichrist of 2Jn.1:7!
Trinitarians are asking us to believe something they cannot prove from the Word of God. We, on the other hand, are asking them to believe something that is explicitly stated in the Bible. JW's believe exactly what these Scriptures say: God's Son Jesus was "born" and "became" a human, "flesh." It does not say he was born as both God and man.
"Ridicule is the only weapon which can be used against unintelligible propositions. An idea must be distinct before reason can act upon it, and no man ever had a distinct idea of the trinity; it is the mere 'abracadabra' of the mountebanks calling themselves the priests of Jesus" --Thomas Jefferson