Almost all of what I've read about the Civil War I've done on my own time or, in small part, at the college level. I am fully capable of critically reading various source material. I happen to have Alexander's book and agree that it contains many interesting insights into the ANV. I also know that nearly all of the Lost Cause era reminiscences that I've seen, including Alexander's, contain a very vehement denial that the war had anything to do with slavery that sounds like they are quoting line and verse from Pollard's "The Lost Cause" and that in many cases it contradicts what those authors were saying before the war. When so many people try so hard to claim that the war wasn't about something that so contradicts what their society was saying before the war, you have to wonder if they "doth protest too much."
I might add that you are going to believe your sugar-coated Lost Cause mythology no matter what and that the United Confederate Veterans and its progeny have done tbeir job.