Its not an easy example. As an Atheist you may feel that way, but if there was no God and I murdered a hundred people so that a billion could live happily without problems for a 1000 years then I would probably be justified doing it.
As morality is relative, I guess it’s possible. Depends if it was a “righteous kill” or not. How many good, decent theists pretend to think they’d murder baby Hitler or Stalin so as to potentially save millions?
Who is going to say otherwise? and even if they did what would it matter…they aren’t the rule makers…because if there is no God then nobody is.
That’s easy. Society says so.
You hopefully realize that during the Inquisition, the scream-inducing thumb screws weren’t being turned by God. They were being turned by a few men in uniform who thought they were enforcing the rules.
If society says you’re free to kill that 1000, or sacrifice a virgin to the rain-god or whatever, then you can do it with little to no moral consequence.
If society doesn’t agree, another man in a uniform makes serious trouble for you.
But fundamentally, when it comes down to it, why does it really matter for an atheist to believe in such things?
Because we generally want safe, functional societies. We also want to be treated well as individuals.
If it is because utilitarianism is the ultimate end of society, then who’s the arbiter?
I think the ultimate end of society is just continuity. We gotta have rules in place or the thing falls apart.
This is where I find it hard to understand why nihilism isn’t the ultimate logical conclusion. Peace , friend
For me, the ultimate aim is peace.
If it is utilitarianism, then nihilism is but a short step away, in the context of atheism as ones fundament.
I think “the common good” of utilitarianism and “the nothing” of nihilism are a bit further from each other than you do.
Regardless, I think your focus on utilitarianism and nihilism in the context of individual and societal atheism may be a bit misplaced - offered with no malice at all.