Quote: I don't think there is such a thing as strong atheist.
Argument from incredulity.
The hard atheist does indeed attract the burden of proof in relation to the non existence of god(s). He is not obliged to explain anything else unless he has made a specific,positive claim.
A common arrogance of the followers of the Abrahamic faiths is that a god MUST and can only be theirs, with his mutually exclusive ascribed attributes.
The existence or non existence of gods infers nothing about the universe.