Not according to the laws of logic. If the universe is EVERYTHING that exists physically, then according to the laws of logic, its cause cannot be physical, otherwise it would have to create itself which is logically impossible.
"Everything that exists" includes much more than the observable universe. It appears the universe extends far beyond what we could possibly observe due to the limitations of the speed of light. In fact, the universe that started with the Big Bang could be infinite. And in that infinite universe there could be places with vastly different laws and nature of reality. We simply do not know.
Not only that, but there may well be physical reality that is not part of the universe that was created by the Big Bang. This also could be infinite. We don't know.
Your logic is basically:
The argument from incredulity
1. We don't know anything beyond the observable universe.
2. If we don't know something, then Ed1Wolf gets to make it up.
3. Therefore Ed1Wolf is right.
P2 is bunkers.
Maybe, but you would still have to analyze the characteristics of the universe to see what nonphysical entity has the most likely features to produce the characteristics of the universe that we see in it.
Quantum mechanics is a good candidate.
After all, we have strong objective evidence that quantum mechanics is actually real.
IMO, the Christian God has more of those characteristics than any other proposed cause of the universe.
One would think the creator of the universe could overcome chariots of iron.
How can an accident create purposes and laws?
Maybe the basic laws of reality always existed. Maybe these basic laws of reality created the laws we know in the observable universe.
We don't know. (And no, that does not lead to the conclusion that Ed1Wolf is always right. See above.)
I have proven it see above where I demonstrated He is the creator and lawgiver of the universe.
Uh, when we say you claim to have proven it, you complain it is a straw man. Then you come right back and claim once again that you have proven it.
The Argument from Proof
1. I have proven this.
2. What? You think I have proven it? Straw man!
3. Your logic is invalid. You use a straw man.
4. Therefore I have proven it.
Needless to say, this argument is bunkers.