He's right, of course. Unfortunately, there was only one States' right that engendered the passion to cost 650,000 lives. What was that in those days...3% of the population?
Passion has nothing to do with it. When you are ordered to strap on a gun and go invade other people who have done you no wrong, you do so because you are forced to do so, not because you are concerned about the well being of people you hate anyway.