Jesus was not created; He was begotten. He proceeds forth from the Father, and He does so eternally. There was never a time when Jesus did not exist. (The terms “time” and “exist” I use lightly when talking about God.)
The universe, however, was created by God, not begotten. The universe is wholly separate from God — the universe is not God, and God is not the universe. Nor is God the “prime-mover” of the universe, for to be the prime-mover of a system is to be a part of that system. God is not a part of the universe even if it’s the first part. He is the creator of the universe, not the begetter.
Deism teaches that God created the universe wholly separate from Himself and afterward had, and has, no interaction with the universe. Pantheism teaches that God is inseparable from the universe as He is the universe and the universe is Him. The proper teaching, in my opinion, is that God did create the universe wholly separate from Himself, but does indeed interact intimately with the universe, even to the point of entering His creation as the man Jesus and continuing with the Holy Spirit.
Calvinism teaches that God’s will is so intertwined with the universe, predestining every detail of what happens from before creation, being the first cause of every event, that God becomes inseparable from creation. How can creation be separate from God when God has already decided exactly what will happen before any event took place and then ensures from moment to moment that all plays out as He predestined?
Some Calvinists would argue with this assertion, “You’re taking things too far!” But these Calvinists aren’t thinking their theology through to its logical conclusions. If God predestines a few things, He predestines all things. If God is sovereign, as the Calvinist defines that term, nothing occurs which is opposite to His will.
What we end up with is a kind of Christian Pantheism where it becomes impossible to imagine any event happening without being directly caused by God. We end up with a universe where only God is real and everything else is illusion. A universe in which there is only God playing out a story of unreal characters in His mind.