Why? Why not?

I agree that there is a definition around believing or assuming there is no God. I think this is somewhat simplistic. Knowing there is no god is the same as knowing there is one. A position without evidence.

However, not believing in a prescribed deity such as an old man who had his child killed for us and bringing flood etc is not the same as not believing in any reason for existing. I assume the frustration of those who are fairly confident that 2000 year old documents are no more than fairy stories get upset when confronted with"if you don't succumb to a prescribed delusion you are saying you know there is no god.

I could be wrong but I don't think a single person on this or similar threads has claimed they know there is no god. However, plenty have asserted there is one. ..

Hence the word delusion entering into the debate.