What evidence is there for this claim?Both time and space and all matter only came into existence with the Big Bang
What was it that actually "banged"?So if there has to be a First Cause, it was the Big Bang.
I'd note that you are speculating here to the 10th degree.Saying something called "God" caused the Big Bang only adds an unnecessary layer of complexity for which there is no evidence.
And quite frankly, Creation does not need to obey your demands for simplicity.
Your demands for evidence that their was a First Cause no doubt will go unheard.
You seem to be implying here that the Big Bang did its thing with absolutely nothing existing prior to it.
That's a pretty complex act - to make something bang from nothing. Or are you saying that occurrence is a simple one?
Explain the simplicity of that.
I can understand that you are willing to say "It was magic!" that made something bang from nothing. But in the same breath demand evidence that God exists?
That's irrational.
The problem with diehard atheists is that they pretend to be humble when discussing mysteries of creation.
But their act immediately goes south when they assert that something quite possibly beyond our comprehension could NOT have played a vital role.
That's the arrogance of false humility for you.