AP Hill was an abolitionist, but he felt that the North did not have the right to force the south back into the Union.
E. Porter Alexander explicitly explained to his Northern Commanding Officer upon resigning that he was fighting to defend the right to succeed rather than slavery.
Cleburne suggest recruiting Negro units.
Lee personally opposed Slavery.
AP Hill never owned a slave, but he was no abolitionist.
Edward Porter Alexander told his commanding officer "But
my situation is just this. My people are going to war. They are in deadly earnest, believing it to be for their liberty. If I don't come and bear my part, they will believe me to be a coward. And I shall not know whether I am or not. I have just
got to go and stand my chances." That's fighting to defend his home state and to prove his courage, not defending the right to secede.
Cleburne did suggest recruiting black soldiers.
Jefferson Davis' response to Cleburne was "“Deeming it to be injurious to the public service that such a subject should be mooted, or even known to be entertained by persons possessed of the confidence and respect of the people, I have concluded that the best policy under the circumstances will be to avoid all publicity, and the Secretary of War has therefore written to General Johnston requesting him to convey to those concerned my desire that it should be kept private. If it be kept out of the public journals its ill effect will be much lessened.”
General Johnston added "the dissemination of even promulgation of such opinion under the present circumstances of the Confederacy, whither in the army or among the people, can be productive only of discouragement, distraction, and desertion. The agitation and controversy which must spring from the presentation of such views of officers high in the public confidence are to be deeply deprecated, and while no doubt or mistrust is for a moment entertained of the patriotic intents of the gallant author of the memorial, and such of his brother officers as may have favored his opinions, it is requested that you communicate to them, as well as all others present on the occasion, the opinions, as herein expressed, of the President, and urge on them the suppression, not only of the memorial itself, but likewise of all discussion and controversy respecting or growing out of it."
Lee did think slavery was "a moral & political evil", but he also
disapproved of abolitionists. Lee's troops enslaved free blacks and
Lee did nothing to rebuke or punish them. As executor of his father-in-law's will, Lee had the option of freeing those slaves immediately, but Lee mad the work for the maximum time the will allowed,