Proof please
Its a given scientific theory, but I would just throw it back at you and say: Make a 'bang' in the void of space without them and prove us wrong, please.
It takes a surprising degree of ignorance of the scientific process to not know that the burden of proof is on the one making the assertion. You have asserted that a "Bang" takes oxygen, fuel and heat. I asked you to prove that assertion. The burden of proof is on you. It is not my burden to prove wrong every ignorant thing you can think to spout.
BTW, the big bang theory does not suggest that a bang occurred in the void of space. It asserts that everything, including the void itself came into being at one moment of expansion that is still ongoing. Not to know the theory you are railing against is a less surprising degree of ignorance but ignorance nonetheless.