Prove Finkelman is a marxist. He's a leftie, all right, in stark contrast to the sources I often quote, who you like to call lefties, but who are not! You guys even call the "claremonsters" lefties!
...which is a marxist by any other name. The "popular" James McPherson is a marxist as well. So are many so-called "historians" of the civil war of their ilk.
in stark contrast to the sources I often quote
Your favorite source to quote around here is Farber, a Berkeleyite liberal. The only difference between him and Finkelman is that Finkelman takes a few more steps to the left.