If a man walks into a room full of people, yells "Allahu Akbar!" and starts shooting, that gets classified as a religious crime.
If a man walks into a room full of people, yells "Death to the capitalist pigs!" and starts shooting, that gets classified as a crime.
But it's a secular crime.
Somehow, it evades that distinction. You can go to the wikipedia page on secular ethics and you'll be treated to adorable little examples like "The Boy Scout Oath". Missing is the Thief in Law code.
Yet another one of those ridiculously common omissions. See, secular ethics are only secular if they're advocated by a man with a soothing voice and are popular at the time - or at the very least, if they're being advocated in company that won't find it unspeakably revolting. Otherwise, they're not called secular. Why, they're not even called ethics half the time. It's just 'crime' or 'craziness'.
It makes conversation more fun, though. For fun, tell an atheist of the Cult of Gnu variety that "rape is an overwhelmingly secular activity".