I almost suggested that, but the story goes that the reason he chose “Forrest” as a pseudonym when writing the book was because of Nathan Bedford Forrest, founder of the Klan. People contain multitudes. I can’t claim to know why he did what he did, but nothing I’ve read about the man (admittedly little) indicates that he was sorry for what he’d done. Ashamed perhaps, but even that I’m just guessing based on the fact that he tried changing his identity and denied being Asa Carter.