"I do not defend a rebellion." That is exactly what you are defending. "What I do defend is the constitutional and moral right of the Southern states to secede, and to form a new government." There was NO such right and certainly NO "moral" justification for what the Slavers unleashed on the United States.
You need to wipe the crud from your eyes if that is all you have seen.
And you need to wipe the manure from yours.