>>781885
>total war is specifically targeted to civilians.
Well think about the way the Southern economy was structured at the time of the war, it was almost entirely agrarian and much of the non-foodstuff military supplies was made by cottage industries. They simply didn't have industry on the scale of the North (hence why smuggled arms were so valuable), so in order to target the military and its supplies it was necessary to target the civilians who provided materiel.
However, such a strategy in the late 20th century and now in our own would be absolutely immoral based on your reasoning for sure, and so given the way our economy is your point about tactical use of nuclear arms may hold water. But to apply that reasoning to past wars is incorrect in my opinion.