Necessity is not evidence

[Chas]

Once you see how the argument works, you may think that asserting or believing the conclusion; the canny atheist will say that he does not believe it is possible that there be a maximally great being. But would not a similar criticism hold of any valid argument? Take any valid argument: once you see how it works, you may think that asserting or believing the premise is tantamount to asserting or believing the conclusion.

That quote is simply nonsense. His last sentence is entirely false.