Then there is atheism which basically means follow nothing, do what you wish, which might mean that you're a great person nonetheless.
Just as it would be wrong of me to say "All deists believe in the same god, that is why they don't take belief in different dieties seriously", its wrong to attach belief in responsibiliity to a category like atheism.
An example of the disparate groups that qualify as atheists: - Antitheists - Nihilists - Some Agnostics - Some Buddhists - Some Stoics
Etc....
How you arrive at "atheism which basically means follow nothing" being attached to a category is beyond my ability to understand.