I love people who idolize Sherman and then conveniently elide him using much the same tactics against the Comanche and Kiowa a few years later. A true moral giant.
I don't think anyone congratulates Sherman on using the March to the Sea tactics on the Native Americans, but with the Confederacy, considering that it was a war machine designed to preserve slavery, I can't fault him for using such tactics against the Confederate war effort (especially considering the brutal tactics the Confederates used against black Union soldiers and so forth, and the fact that he didn't kill that many people with the March to the Sea).