Simple error in logic. You have constructed whats known as a faulty inference.....since matter and energy are neither being created or destroyed then we can infer that matter and energy are eternal.
The LoC (law of Conservation) is a physical law of nature, thus it governs within nature.
Let us assume that the Law of Conservation of Energy is true, and state this law to be clear as to what it implies. This is from Wiki:
In physics, the law of conservation of energy states that the total energy of an isolated system remains constant—it is said to be conserved over time. Energy can neither be created nor destroyed; rather, it transforms from one form to another.
If energy cannot be created or destroyed, then a supernatural creator, lets call it god, cannot create or destroy energy. Therefore, the matter and energy we observe in the visible universe must have existed prior to the initiation of the big bang, the expansion of our visible universe. All your god hypothesis does is add a layer of complexity to the answer. The energy already existed in some form, and an intelligent entity is required to get the ball rolling. What you haven't explained is why this is the case. We see tornados and typhoons, star formation and supernova happening in nature without the intervention of any intelligent entity. Why would our universe require such an agent? Why couldn't the universe be the result of natural forces that we do not currently understand?
SBBM indicates that nature had a beginning. If your faulty inference is correct then Why don't cosmologists consider this physical law of nature a violation of the SBBM? Really...that is a serious question....Because that is what you are suggesting here. Note also that this is a religiously neutral question.
Our current models of reality point towards the expansion of the visible universe from a small, dense point about 14 billion years ago. However, we have no idea if the visible universe is all there is. Theoretical models (M-theory) predicts other dimensions of existence beyond the four we are familiar with, and suggests that the collision between such dimensions (branes) may have provided the energy that led to our visible universe. You seem dead set of arguing that the state of the universe at the initiation of expansion is all there is, because you need this to shoehorn your favorite creation story into an explanation of the universe's origins. The fact is we DO NOT KNOW. There could be an infinite number of conditions that could theoretically have led to the formation of our visible universe, most or all of which are unknown to us. That is the honest answer.
By universe I mean.....the traditional......The universe is all of physical reality.
from wiki....
The Universe is all of time and space and its contents. It includes planets, moons, minor planets, stars, galaxies, the contents of intergalactic space, and all matter and energy. The size of the entire Universe is unknown.
oxford..
the universe All existing matter and space considered as a whole; the cosmos. The universe is believed to be at least 10 billion light years in diameter and contains a vast number of galaxies; it has been expanding since its creation in the Big Bang about 13 billion years ago.
Both good with me.
If the universe began to exist 14 billion years ago, and the visible universe is all there is, then a supernatural creator could NOT have existed prior to this event. Nothing could have existed prior to this event. If you claim god is required to explain the origins of the visible universe, this god would have had to exist in some form of space-time continuum prior to the event, and have had access to energy in order to initiate the event. No matter how you twist the argument, you cannot escape this conclusion.
You have failed on both accounts to defeat either premise.
Your offered defeaters are for more implausible then the premises themselves.
The argument stands valid.
The best you can claim is that the argument is not compelling.
Lets be honest. The only reason you believe this argument is because you are biased towards your favorite creation story. Even if our visible universe was created by an intelligent entity, there is no evidence to connect this creator to your preferred god. Sorry, but you can polish this turd all you want, but it still stinks.