I’m surprised the article didn’t mention that Cleburne was also an early and pointed advocate of enrolling blacks into the confederate army.
"He was an ardent supporter of the South, yet called at one point for blacks to earn their freedom if they fought for the Confederacy. Other generals hated the idea. Historians think Cleburne’s plan cost him promotions."
His plan was eventually adopted by the Confederacy, something like six weeks before the war ended, at which point it had of course no impact on events. It can be seriously questioned whether a black man wearing a uniform and firing a rifle provided any greater support for the Confederacy than the same man driving a wagon or a plow. Every black man put into service as a soldier could not provide other essential services.