Did he ever in his life? It would have been totally out of character for him to take the public stage. He didn't even take the stage and respond to the newspaper article about his supposed whipping of two slaves, although denying it privately. Besides that, he was war weary, had heart disease, had lost everything he had in a, I'll say it again, a war he never wanted to occur to begin with. Now, that he somehow didn't do what you, a 155 years later, think he should have done, he's some kind of vindictive, bitter, old man, nursing a grudge.