"I may not affect the cource so much, but it may affect what and how it is taught."

Is that not the same thing?

"Have you ever stood before a class and said the South may have been right or the noth may have been wrong?"

No. But I haven't ever stood before a class and said the North may have been right or the South may have been wrong. It is not my goal or interest to tell students or anyone who was "right" or "wrong" about something like secession. I want to help them understand what people of the time thought, said, and did...and why.