Re: You've known more atheists than you think....
For fear of what? Are you kidding? Do you see the reaction I get on this board? Look at the reaction I got just for saying that some atheists are closeted. Amongst other things I get called a delusional son of a bitch by you. Considering that attitude, don't you think there's a good chance that if an atheist was a friend of yours he'd simply stay silent about his atheism rather than speak out? Who wants to say something about themselves to a friend that will result in a harsh, negative reaction? Nobody.
With regards to the self-proclaimed atheists you know, let me remind you that such people are by definition not in the closet.
Morality most certainly was not based originally on religious values and teachings. Morality pre-dates religion. Religion served as a mechanism to enforce morality, what with the premise that an all-powerful God is making rules you must obey and that the all-powerful God is watching you at all times to make sure you do obey. And I can see how that serves a purpose in certain circumstances. But it's not like the moral rules weren't already in existence. Religion is an enforcement mechanism or morality, not a creator of morality.
Even animals exhibit forms of morality. And people all over the world, regardless of their religion, exhibit morality.