Was Total War And Siege Tactics Necessary

I believe that they shouldn't have used these tactics in battle especially total war. I feel total war was really wrong because they are attack people innocent people that are just be living in the south, and they are burning their valuables and houses to the ground without remorse.  This really affected the innocent  because they are making civilians suffer for a war they are not even fighting. Same with siege I mean they are cutting off their food supplies without caring about their lives and just caring about how this helps them in the war. So no its not okay to do this because they are harming innocent lives without remorse and just caring about how it helps them in the war effort.