He accuses Sherman of antisemitism, which is the first I've ever heard of. He does not give any specific facts to show it, however. I can understand someone of his background calling Sherman a lot of names.
Sherman may have been an anti-Semite, though I am unfamiliar of any instances. But it's certainly possible. Wasn't it Sherman who (ironically despite his middle name) said "the only good Indian is a dead Indian?" And he was certainly a racist who had no use for Blacks. After becoming the most hated man in the South (with the possible exception of Benjamin F. Butler) the truce he offered Joe Johnston was so lenient it would have allowed them to keep their slaves. Lincoln and Grant had to intervene.
I knew where this thread would go when I posted it, which is a shame, the author was simply explaining why he honors his ancestors. You're correct, he's not accuing Lincoln of being antisemitic, he is implying the north was, an arguement he bases largely on the Grant incident. Which Sherman was thought to have instigated, in a letter either to Grant or the Adjutant General. Of course Grant claims the order was issued with an aide, without his knowledge. And some historians suggest that a major factor was Grant's father (in law?) who was earning beaucoup dollars trading cotton in partnership with a practitioner of you know what religion. If you want to shut down pops trading, barring Jews would have been a good way to do it.
In any event, in the context of their time neither Sherman nor Grant nor Lincoln demonstrated any animosity toward Jews, and they had ample opportunity, so it's silly to fret about northern antisemitism a decade and a half before Marr invented the term, in Germany.
Since this is so much fun, I'm posting his earlier article, Shame of the Yankees - America's Worst Anti-Jewish Action .