Someone suggested earlier in another post (hi PR. Tony got here before me - and has already mentioned purposeless particles!) that if morality wasn’t based on some religious foundation then, in effect, we have to accept everyone’s individual moral viewpoint. Which, of course, we don’t.
The example used was torturing a cat. And that if an atheist said that they thought it was entirely acceptable to torture a cat then we would have to accept that as a valid viewpoint.
I don’t know about you, but I don’t think that it’s valid at all for any number of reasons, none of which are connected with a ‘moral law giver’. I think that, despite the fact that I can’t recall anything in scripture about feline mistreatment, it’s a pretty bad idea.
Hands up anyone who can’t think why that is so without recourse to your faith.