We can start with which one used starvation as a weapon and then move on to which used rape and looting to terrorize American citizens for the crime of where they lived. We can finish with which one used the aftermath of the war to line his and his cronies pockets and which one did everything he could to heal the country.
Good men fought on both sides and they were all Americans and very few singed up because their view on slavery on either side and no band off half witted faux intellectuals can re-envision history to change that.