What dont you get? Good morals are innate, a very young child can steal something and feel guilt, no one instilled that guilt in him, it just is. A young boy can hit another boy and cause pain, the former will feel "bad" that he made another person hurt. That feeling is inside every human with birth. It does not take religion to instill something that is already in us.

The people you listed HAD these innate morals, but at some point in THEIR life, they negated them to instead become bad humans. Lack of religion did not cause this, just as much as lack of religion did not keep me from being decent to other people.