I see your point. Thank you for your well worded explanation.

My personal view is not to see religious or secular but that we are all dealing with the same thing.

I enjoy CS Lewis’s discussions on universal morality as he was someone who was an atheist who later professed faith in Jesus Christ.

At least in philosophy the two terms are interchangeable. Moral philosophy deals with all sorts of ethical theories, not just divine command theory (God's commands decide what's moral and what isn't)