Originally posted by epiphinehas
Except the implication of the atheistic world-view is ethical relativism. On atheism, there is no absolute moral truth—no "one morality"—as you claim.
Well clearly this atheism religion you mention is not my religion. I call myself an atheist because I don't believe in God, not because I subscribe to any set of rules - especially ones that seem to be made up by you.
An appeal to social convention in order to establish who is more correct—the children or the Gestapo—is fruitless.
I made it quite clear that I do not appeal to social convention. I wonder why you think atheists should do so.
More importantly though, Christianity fares no better than what you describe. Christianity essentially establishes as the moral standard whichever concept of God the believer holds. So again, every believer has a unique idea of morality, and although there may be some agreement amongst believers (social convention) there is often significant disagreement between groups. (Yes the Nazis were Christians not atheists).
Although every believer may chant "there is only one morality, and it is the one my God defines", this is no better than your understanding of atheist morals in which every person chants "there is only one morality and it is what I define".
But I challenge you to show me any persons system of morals that does not fit my outline regardless of what they claim is the source of the moral system. Even the Nazis morals would fit my description.
What is relative is not the basic rules of morals, but the evaluation of morals. This includes who you define as a person (this affects racism, attitudes towards slaves, foreigners, and even abortion), what weighting you give to personal cost vs assistance / harm to others etc.
What I may have left out, but is still important, are the concepts of blame and just deserts. The Nazis blamed the Jews for not following Christ (as do many Christians), and thus helped to justify to themselves maltreating them. Equally, you will see in the thread on rich vs poor, that people justify not helping the poor on the grounds that the poor may be capable of helping themselves (and thus its their own fault if they are poor). Again, how we weight these considerations varies from person to person.