Since we are already being unhelpful: Atheist don’t all are unsure about if God exists. Some may believe God does not exist, some don’t care. Some believers might be unsure or don’t care either.
being unsure or uncaring is supposed to be agnosticism, though. atheism is an outright rejection of the possibility. (this is NOT a commentary on if one is more correct than the other.)
Since we are already being unhelpful: Atheist don’t all are unsure about if God exists. Some may believe God does not exist, some don’t care. Some believers might be unsure or don’t care either.
being unsure or uncaring is supposed to be agnosticism, though. atheism is an outright rejection of the possibility. (this is NOT a commentary on if one is more correct than the other.)