Was caesar a scumbag?
One of the less adroit techniques of the neo-rebs is to present historical people in modern day light, and hope that people today will be ignorant enough to condemn them.
Walt
The problem is, when a cause needs a warrior, you want EXACTLY the kind of "scumbags" like Sherman to be leading your troops, because it is their lives that will be saved in the end. He was phenomenally frugal with the lives of his men, unlike Jackson, Lee, or especially Grant and Burnside. For that he deserves praise.