Yeah, no-ne can prove there is a god.
But no-one can prove there isn't either.
You can't disprove any Fairy Tale.
Can you disprove that Frodo Baggins, Gandalf, Elrond and the elves didn't really exist in another galaxy/dimention/time??
Can you disprove the Flying Spaghetti Monster??
When someone claims belief in something that can't be disproven, this should sent up red flags.
In order to tell if something is true, we have to be able to establish a criteria by which it isn't true. If you can't do that, then you should discard the belief as untrue by default.