Which is it atheists? Can non-theists intuit a moral law or not?
If non-theists can intuit a moral law, why isn’t that law “natural law”? If non-theists can’t intuit a moral law, why do you get all hepped up when Christians accuse you of having discarded morality with theism?
Frankly, these questions also apply to the Christians who make argue that atheists are necessarily amoral (or at least philosophically so, even if their upbringing and membership in a society that still maintains some moral momentum from its religious past keeps them on the somewhat straight and not-particularly narrow).