According to Biblical Unitarians, is it theoretically possible for God to incarnate as a human and live a holy and humble life? For Biblical Unitarians, and from a theoretical standpoint, can God make use of His omnipotence and free will to take on human form and teach us by way of example what it is to live a holy and humble life, from birth to death? According to Biblical Unitarians, is this something possible for God, or is it beyond His capabilities?
My guess is there is no single answer on this for all Biblical Unitarians, but given what I understand of Biblical Unitarianism, the answer is probably:
No. &quot;God is Spirit.&quot; (John 4:24) 'Omnipotence' is a word with a classical theological development that isn't found in the Bible, although the word 'pantokrator' which means 'all-ruling' or 'all-mighty' is. God is the Creator (Genesis 1:1). As such, He could create a human who in turn could teach us by way of example what it is to live a holy and humble life - and that is exactly what He did.

&quot;[The incarnation] appears to mean that the divine Maker became one of
His own creatures, which is a prima facie contradiction in
theological terms. [...] Such an assertion, considered abstractly
against the background of Old Testament monotheism, might seem
blasphemous or nonsensical— as indeed, orthodox Judaism has always
held it to be.&quot; Jesus Christ: Incarnated or Created?

and

&quot;Jesus makes clear reference to two distinct categories in John 3:6
when he says that the “Flesh gives birth to flesh, but the Spirit
gives birth to spirit.” Jesus clearly declared God to be “spirit”
(John 4:24). Note that he did not say, “I am spirit,” or “God is
flesh” or even “The Father is spirit.” By thus placing “God” in the
category of “spirit,” when he himself is clearly a man of flesh and
blood, Jesus effectively excluded any possibility that he was God. If
God, being spirit, can incarnate Himself as a man, then the clear
scriptural distinction between flesh and spirit disintegrates. But God
the Creator, who is spirit, can create flesh, as He did in Genesis 1.&quot;

Furthermore

Athanasius [a bishop of Alexandria who spearheaded what became the
orthodox Trinitarian position] says that God can do anything He
chooses to do, and that He chose to turn Himself into a man for the
sake of our salvation. Jesus Christ is not one of God’s creatures, he
insists, but God Himself, incarnated in human form. These sound like
clear statements, but, actually, they are hopelessly confused.
Can God do anything He chooses to do? Of course—except those things
that are inconsistent with being God. Can He choose to be evil or
ignorant? Could He be the Devil—or nothing at all?
Perfection cannot be improved upon or changed. He is not a pantheistic
“god” who dwells in everything. He is holy, meaning that He stands
apart from and above His creation, yet is intimately involved with it.
Therefore, God cannot alter His essential nature, which by definition
is perfect, and perfection cannot be improved upon. But even if He
could, in doing so He would, by definition, no longer be “God.”

To think God Himself could incarnate is to get caught up in a category error. It is like asking &quot;Could God not be loving?&quot; God is love (1 John 4:8). Or &quot;Could God be unjust?&quot; A core attribute of God is justice. 'Omnipotence' does not mean God can defy his own nature.