A resort to violence is not a principled argument. If every disposition of a human populace is to be decided by violent conflict, then what need have we of arguments from principle? Let us just get to the killing and stop pretending we are reasonable.
Let us stop pretending the Union invasion was based on any noble idea. It wasn't. It was just a bigger group of people forcing their will on a smaller group of people. In that regard, it was based on the same underlying concept as slavery.
Man, you are on a roll this morning! Hyperventilate much?!
So no rebellion is ever principled? Do they lose their moral legitimacy as soon as someone fires a shot?