I would say that every claim of this statement is wrong, so I wouldn't bother trying to defend it.
Now if you believe
:It's OK for something to have existed since t=-infinity but it's not OK for something suddenly to come into existence.
Then it seems reasonable to believe that something existed before the big bang which caused the universe to come into existence, i.e (on the basis of A
) Big bang=>Creator (or equivalently No creator=>No big bang)
Certainly this was a common point of view before the discovery of the CMBR, when the big bang was seen by many as tantamount to creationism.
I would say, though, that A
isn't a reasonable belief, since time is we can easily rescale the time coordinate. The real question is 'Why is there something rather than nothing', and this provides much less support for the idea of a creator.