Why should the pre-incarnate Jesus be referred to only as "God" and not "Jesus"?
Have you not answered your own question?
Why should the pre-incarnate Jesus be referred to only as "God" and not "Jesus"?
Have you not answered your own question? It's like referring to a piece of bacon as a 'bacon sandwich' simply because the bacon was later placed in between two pieces of bread.
I would be happy to discuss Unitatrianism. If you're able, you may also message me.
It's of vital significance to understand that there are multiple forms of Unitarianism. One of the heresies of the Early Church was a form of Unitarianism known as Sabellianism, which didn't deny that Jesus was God, but rather, argued that it was the Father who took on flesh, and was incarnated in the person we know as Jesus. There are multiple Unitarian groups, all with significantly different views of Christ, but the primary belief that they each share is that God is one sole individual. In this particular scenario, it's important to understand what distinguishes Trinitarianism from Sabellianism/Modalism.
Modalism adheres that prior to the incarnation Jesus pre-existed as the person of the Father, and He alone created the heavens and the earth. And it was in the incarnation that the pre-incarnate Jesus took on the role of "the Son." Whereas Trinitarianism teaches that the pre-existent Jesus eternally existed alongside, and whose work in creation is coextensive with that of the Father.
As I stated in an earlier post, I am (for now, at least) hesitant to label you Modalist, because there is the possibility that you are a Trinitarian that believes in incarnational Sonship (that is, the pre-incarnate Jesus, who existing eternally alongside the Father later assumed the role of "the Son" at a certain point in the incarnation).
So before I invest too much time into responding, I'd really like to know which side of the coin you fall on.