No, it isn't. He stated several times that he came from heaven, in that one passage alone, but also several other times:
Joh 3:13 No one has ascended into heaven except
he who descended from heaven, the Son of Man.
Joh 8:23 He said to them, “You are from below;
I am from above. You are of this world;
I am not of this world.
Joh 13:3 Jesus, knowing that the Father had given all things into his hands, and that
he had come from God and was going back to God,
Joh 16:27 for
the Father himself loves you, because you have loved me and have believed
that I came from God.
Joh 16:28
I came from the Father and have come into the world, and now I am leaving the world and going to the Father.”
And the disciples replied:
Joh 16:30 Now we know that you know all things and do not need anyone to question you; this is why we believe
that you came from God.”
Which is why John also states Jesus came from heaven:
Joh 1:1 In the beginning was the Word, and the Word was with God, and the Word was God.
Joh 1:2 He was in the beginning with God.
Joh 1:3 All things were made through him, and without him was not any thing made that was made.
...
Joh 1:9 The true light, which gives light to everyone, was coming into the world.
Joh 1:10 He was in the world, and the world was made through him, yet the world did not know him.
...
Joh 1:14 And the Word became flesh and dwelt among us, and we have seen his glory, glory as of the only Son from the Father, full of grace and truth.
Joh 3:31
He who comes from above is above all. He who is of the earth belongs to the earth and speaks in an earthly way.
He who comes from heaven is above all.
(All ESV)
Except that Jesus was unequivocal in his claim to literally have come down from heaven. The manna came down from heaven, just as Jesus came down from heaven; that was rather his point, except that he is the eternal life giving bread.
Why have you or no other anti-Trinitarian tried to address
THIS post? I'll copy and paste for ease:
Joh 17:5 And now, Father, glorify me in your own presence with
the glory that I had with you before the world existed. (ESV)
But, what did Yahweh say?
Isa 48:11 For my own sake, for my own sake, I do it, for how should my name be profaned?
My glory I will not give to another. (ESV)
Is Jesus contradicting what Yahweh said? Let's first look at something John said:
Joh 12:36 While you have the light, believe in the light, that you may become sons of light.” When Jesus had said these things, he departed and hid himself from them.
Joh 12:37 Though he had done so many signs before them, they still did not believe in him,
Joh 12:38 so that the word spoken by the prophet Isaiah might be fulfilled: “Lord, who has believed what he heard from us, and to whom has the arm of the Lord been revealed?”
Joh 12:39 Therefore they could not believe. For again
Isaiah said,
Joh 12:40 “
He has blinded their eyes and hardened their heart, lest they see with their eyes, and understand with their heart, and turn, and I would heal them.”
Joh 12:41
Isaiah said these things because he saw his glory and spoke of him. (ESV)
Who does John say Isaiah saw in "his glory and spoke of him"? Clearly, John is meaning that Isaiah saw the glory of Jesus, or rather, the Son. Looking at the context of what Isaiah was talking about:
Isa 6:1 In the year that King Uzziah died
I saw the Lord sitting upon a throne, high and lifted up; and the train of his robe filled the temple.
Isa 6:2 Above him stood the seraphim. Each had six wings: with two he covered his face, and with two he covered his feet, and with two he flew.
Isa 6:3 And one called to another and said: “
Holy, holy, holy is the LORD of hosts; the whole earth is full of his glory!”
Isa 6:4 And the foundations of the thresholds shook at the voice of him who called, and the house was filled with smoke.
Isa 6:5 And I said: “Woe is me! For I am lost; for I am a man of unclean lips, and I dwell in the midst of a people of unclean lips;
for my eyes have seen the King, the LORD of hosts!”
…
Isa 6:8 And I heard the voice of the Lord saying, “Whom shall I send, and who will go for us?” Then I said, “Here I am! Send me.”
Isa 6:9 And he said, “Go, and say to this people: “‘Keep on hearing, but do not understand; keep on seeing, but do not perceive.’
Isa 6:10 Make the heart of this people dull, and their ears heavy, and
blind their eyes; lest they see with their eyes, and hear with their ears, and understand with their hearts, and turn and be healed.” (ESV)
So, who did Isaiah actually see? He saw Yahweh in all his glory. Once again, John supports what he said in John 1:1--that the Word was in intimate, interpersonal relationship with God for all eternity past, meaning that the Word is also God in nature.
Throughout the entire book of John, from beginning to end, there is one consistent message about who Jesus, the Son of God, is--God in human flesh, both truly man and truly God, who, in becoming flesh subjected himself to the will of the Father for our salvation and the redemption of creation.