thats not what i meant.

first and foremost atheism is the rejection of the belief in god or the existence of god. there are weaker versions that define atheism as lacking such a belief at all but imo such a position is so close to agnosticism or just plain indifference that its (almost) impossible to distinguish them.

now that being said, if IA and KAV claim their position is no a rejection of the belief but a lack of such belief (regardless of how the rightfully or wrongfully name that position) then it can be pointless indeed to ask for reasons for the lack of that belief. Its kind of hard to give your motivation for something that does not exist (within you). while its meaningful to ask someone what are your reasons for saying no to a certain proposition, it may not be meaningful to ask why someone does not have any judgment at all of such a proposition.