Edited.
I should think individual motivations would be important, the only reason it wouldn't be, would be to try to disingenuously lump everyone into something they aren't. Fact is most people are going to defend their community/country if needed, regardless of politics...….and to many on both sides in 1861 their state was their country.....Take the border states, many here try to lump them with the south in identity/affiliation, yet in every one the majority followed as the state went. Missouri doesn't secede, Missourians served roughly 3-1 for the north