However modern Christian thought has a tendency to turn poetry into prose, turning a statement of identification into a statement that they are the exactly the same thing. I think saying "Jesus isn't God" is really a protest against this, not a denial of John’s Christology.
First, the argument is absurd. How is Christ being described as the "Word", existing from "the beginning" with God and being God, being incarnated into flesh, having life in Himself, creating the world, etc etc, really just a statement of "identification" with God and not really being God, as the words plainly say? Not even the heretics can stand up well to the whole sentence, hence the Jehovah's Witnesses just retranslate it entirely. It is basically like saying "I am a God like being and the creator of the world... who only identifies with God, never mind how the verb 'is' works."
This is not a matter of "modern" Christians somehow misunderstanding the verb "is" in the scripture and somehow missing that Christ only meant that He was a man with some sort of ambiguous divine nature. It is a matter of the clear teachings of scripture and about 2,000 years of Christianity.
Ignatius
"For our God Jesus Christ, was, according to the appointment of God, conceived in the womb by Mary, of the seed of David, but by the Holy Ghost."( Epistle of Ignatius to the Ephesians 4:9)
Justin Martyr
"For Christ is King, and Priest, and God and Lord..."(Dialogue With Trypho, 34)
Iranaeus
"In order that to Christ Jesus, our Lord, and God, and Savior, and King..."(Irenaeus Against Heresies, 1.10.1)
Theophilus
"For the divine writing itself teaches us that Adam said that he had heard the voice but what else is this voice but the word of God, who is also his Son." (To Autolycus 2:22 ,160 A.D.)
Clement of Alexandria
"The Word, then, the Christ, is the cause both of our ancient beginning, for he was in God, and of our well-being. And now this same Word has appeared as man. He alone. is both God and man, and the source of all our good things" (Exhortation to the Greeks 1:7:1).
Tertullian
"The origins of both his substances display him as man and as God: from the one, born, and from the other, not born" (The Flesh of Christ 5:6-7).
Athanasius
"[The Trinity] is a Trinity not merely in name or in a figurative manner of speaking; rather, it is a Trinity in truth and in actual existence. Just as the Father is he that is, so also his Word is one that is and is God over all. And neither is the Holy Spirit nonexistent but actually exists and has true being." (Letters to Serapion 1:28).
The Athanasian Creed
"Whoever desires to be saved should above all hold to the catholic faith.
Anyone who does not keep it whole and unbroken will doubtless perish eternally. Now this is the catholic faith:
That we worship one God in trinity and the trinity in unity,
neither blending their persons
nor dividing their essence.
For the person of the Father is a distinct person,
the person of the Son is another,
and that of the Holy Spirit still another.
But the divinity of the Father, Son, and Holy Spirit is one,
their glory equal, their majesty coeternal.
What quality the Father has, the Son has, and the Holy Spirit has.
The Father is uncreated,
the Son is uncreated,
the Holy Spirit is uncreated.
The Father is immeasurable,
the Son is immeasurable,
the Holy Spirit is immeasurable.
The Father is eternal,
the Son is eternal,
the Holy Spirit is eternal.
And yet there are not three eternal beings;
there is but one eternal being.
So too there are not three uncreated or immeasurable beings;
there is but one uncreated and immeasurable being.
Similarly, the Father is almighty,
the Son is almighty,
the Holy Spirit is almighty.
Yet there are not three almighty beings;
there is but one almighty being."
When you "waffle" as you confess, you do not stand against modern day stupid Christians, but against the entire Church for 2,000 years. Sit with the anti-Christian PCUSA sophists who are the real modern day aberrations. A Christian will sit with the Bible and with the church of God.
Jesus is making the point that the Bible is willing to speak of someone as god who is even less close to being identified with God than he is. This defense is interesting. Many Christians would have preferred him to say "but I *am* God." But he doesn't. Instead he points to flexibility in what it means to be identified with God. Feel free to debate with him.
Jesus makes no such point, since such a point would mean that the Word, who existed with the Father from the beginning, who identifies as the "I am," and of being present even with Abraham, of creating the world, isn't really God, though, obviously, He must be. Christ's argument is not one of "you can identify as God too," but a "how much more than" does the Messiah deserve the right to call Himself God. All magistrates are called "gods," because they sit in God's seat as His representatives and receive His word, though the scripture immediately adds "but ye shall perish as men," of these same men who are called gods moments before (Ps 82:6). Christ is claiming to be greater than the magistrates because He is the Messiah, "whom the Father sanctified, and sent into the world," doing the "works of my Father [and] the Father is in me, and I in Him." In other words, He is claiming the Messiah is the ultimate representative of the Father, and is the almighty God Himself, being with the Father and the Father in Him. Rather than stating that He was sanctified by the Father and sent into the world, performing His works, you should have preferred that He said "But I'm not really God, or greater than you or the magistrates, and thus I will die as a mere man too."
Just to be clear: I am not accusing the Nicene Creed of making this mistake. As far as I can tell it is intended to be a restatement of John's Christology, and as such as just fine. Use of a wider range of NT descriptions would have been welcome, but I believe they used the specific things that they needed to defend against Arius. After all, Nicea didn't really represent a final doctrine of the Trinity. That discussion continued for a couple of centuries, as I'm sure you know.
I was reading the novel Barry Lyndon, and he describes his family as being the most famous and virtuous in all the world, "as everyone knows." I'm not sure we should take such people as you and Lyndon as authorities in and of yourselves. Although Lyndon is a less dubious person than you.