Because the form of your proposition was, and is, entirely a "false dilemma", that's why.
You're as phony as a used-car salesman, so spare us the injured innocence.
Either A, which I know isn't forthcoming, or B, I get my way on the point I need to support "it was all about slavery/South 'rebelled'".
Phony as a three-dollar bill.
Since Carton253 has decided he no longer wants to continue the discussion why are you?