Since religion plays such a big role in shaping events and cultural preconceptions in the world today, I believe that a good knowledge of comparitive religions should be taught. Additionally, and concurrently, I think that comparitive belief systems (paradigms or world views) should be explained along with it.
I do not think that I could teach it, for I am intuitively biased towards Christianity.
One may argue that anyone is intuitively biased towards one philosophy/theology or another, however!