Does it make any sense to ask what is the case for atheism?

[ideologue08]

Those are not examples historical evidence, nor are they examples of anecdotal evidence.
To deny either of your examples requires no more justification than to justify disbelief that the god Indra battled Vitra as recorded in the Vedas.

As long as there are eye-witness claims or purportedly to be so, there will always be some justification required to reject it, you cannot reject an alleged eye-witness without some sort of justification. Well you can, but then the rejection will be baseless.