Is atheism a belief?

[Deesse23]

The big bang theory goes on the premise that time and space began at that moment.

You got it exactly backwards: The big bang theory and the idea that time and space began is the result of evaluating data and prior knowledge. Namely the established fact(s) supported by data that the universe is expanding, acceleratingly expanding. Its not too hard what may the starting point of an expansion, isnt it?....unless of course you presuppose a deity which does not fit (in terms of: its unnecessary) into the picture.

It shows the fundamental flaw in your thinking, religion has removed the ability from your mind to be reasonable. I has infected you with the virus of having to make your conclusion first and then looking for arguments to arrive at said conclusion. You cant even think of other people having other thinking proccesses that lead to reasonable  results.

Thats how much you have been mentally crippled.