See if this fits the scenario you described. Black Confederate advocates manufacture quotes by Ed Bearrs, Robert E. Lee, Nathan Beford Forrest and others. When you call any one quote into question, you get an angry response along the lines of, "So you really think you're smarter than Ed Bearss?" or "Are you calling [name of respected person inserted here] a liar?" Anything you say after that will just provoke an even more angry and unreasonable response.
One BCA said that anyone who questioned the Black Confederate stories should be regarded the same as a Holocaust denier and a Nazi apologist.
These Black Confederate Deniers have a pre-conceived idea of what the Confederacy was all about, and then try to create a history that fits their misconception. They bring to mind the Holocaust deniers and German apologists.
Now we know the truth -- I'm a BCD-HD!