I must say, the two on here who claim Jesus was created, are the only two Trinity believing Christians I have heard say that. Why is it so hard to accept that he wasn't created but not hard to accept that a virgin conceived him? I am not implying that he was always flesh. What has invaded your thinking on this I think, is something you address often. Seeing things from a human perspective, unable to see or comprehend it from any other perspective. It is the only perspective we have. So the assumption becomes if he was not always flesh, and he came as flesh, then that flesh must have been created. I think Scripture bears out that a creature, even one who has no sin nature and never sinned, cannot atone before the thrice Holy God for the sins of fellow creatures.
It speaks to our minds only being able to say things are one way, and at the same time we accept without question (faith) other things that are just as "impossible" from our perspective.
Here's another. Often in Scripture we have angels, created but invisible spirit beings, appear with visible, eating and drinking flesh. Does that mean God created that flesh, then uncreated it when their mission was accomplished? Did he create in the donkey that spoke, a human voice box and the capacity to speak whatever human language it was speaking. When God says let there be---there is. No matter whether it is a creation or just an "is".
That is why the doctrine that Christ is not created is called the incarnation, which means the act of being made flesh. "The Word became flesh and made his dwelling among us. He took on human flesh. Why? He had to be born under the law and keep it perfectly to fulfill all righteousness in order to be our substitute. And he had to shed his blood for the forgiveness of sins (Heb 9:22).
"When Christ came into the world, he said: 'Sacrifice and offering you did not desire, but a body you prepared from me'" (Heb 10:5).
We are not saying Jesus was created. We are saying his body was created. Call it formed, if you will. Call it whatever you want, I have to think that his human physical temporal body was made as ours are, by whatever means God saw fit. Do you say his human physical temporal body existed as God from all eternity with God? I don't think you do.
Your paralleling his existence as Christ, granted, 'appearing in the flesh', just as the Bible says, with the angels now and then appearing as flesh, eating and drinking, to me doesn't work. Their flesh was not actually human, in the normal sense. I think Jesus' flesh was in every way as ours, yet without sin. As Adam's flesh was —not as the angels'. It would be false equivalence, in my opinion, to say his flesh was like the angels', or formed as theirs was for a temporary purpose.
I don't claim to know what exactly is the difference between risen Christ's body, and later what it was as glorified, but in this the angels have no share. If there was any permanent —i.e. "from all eternity past and future"— body that WAS God, I think it would have to be Christ's glorified body, and that is a riddle beyond my ability to work out. And it is probably completely wrongly stated, anyway, so not sure it's worth chasing that rabbit.
Also, I admit, for whoever wants to razz me about it, that I don't know what form his body took/takes/has/is as THE LORD OF ALL —God himself— in heaven. One of my favorite and very useful axioms in arguing about God's existence, is that He does not answer to form. If he had a human body, but not created, then I should think it implied that he has had a humanly comprehensible form all along. I don't think he has. Nor even now, after his glorification, I think. WE are the body of Christ, bone of his bone and flesh of his flesh.