Miburo

Uh, yes? He's using it as an analogy to show how an illogical belief is harmless so long as it is not applied to the rest of the world. While it's true that one cannot disprove the existence of God (or pretty much anything else for that matter), that doesn't mean it's a bit more logical then believing 2+2=5.

Because it can be, and has been, shown that the belief in baseless claims is illogical. Just like it can be shown that the belief that 2+2=5 is illogical. They're both illogical. It's a fitting analogy.

There isn't a scale of logicalness or anything. Shit is either logical or it isn't.