Greetings,
It was a interesting article, Laurens - if I may, I'd like to add some thoughts for your consideration.
I think, as you suggest, the class/subject should be called "Philosophy and Ethics" rather than, say, "Comparative Religions", since this assumes that one is only dealing with religions rather than the broader topic of philosophies around the world over time.
One problem, particularly in America, is the notion that "theism equals moral,
atheism equals
amoral".
It should be explained that Theism and Atheism are banners - big tents under which various philosophies of life are gathered.
Under Theism are gathered philosophies of life based on gods - under Atheism are gathered philosophies of life
not based on gods.
As philosophies of life, they both espouse morality - they just have different reasons, explanations, and/or drivers for it.
In this way, and through approaching it from a "comparative philosophies" perspective, one could better teach philosophy, as it pertains to ethics and morality, without getting bogged-down in theism.
Indeed, who better to teach it than an atheist!?
Kindest regards,
James