"I do not go as far as Stephen Hawking, who has argued that no god could have brought about the big bang because before the big bang, time did not exist and therefore there was no time for any god to do his work. "

If find this highly unlikely. It would indicate that Mr. Hawking does not know what a singularity is and that would be a surprise to me because I learned what a singularity is from Mr. Hawking's writings.

We, Mr. Hawking included, I would hope, who accept the definition of a singularity make no presumptions about what can occur within a singularity because by definition, we cannot know.