Please cite a source by Hitler citing Sherman’s Tactics. Otherwise sounds like pure B.S.
"Our method of warfare is different from that of Europe. We are not fighting against enemy armies but against an enemy people; both young and old, rich and poor must feel the iron hand of war in the same way as the organized armies. In this respect my march through Georgia was a wonderful success." - General Sherman to General Grant, end of January, 1865.
Actually Hitler had no direct dealing with Signal magazine. It was published by the Propaganda Command of the Wehrmacht.
General Hasso von Wedel commanding.