Likewise in its own Confederate Constitution it did also.
So, how can selling something be immoral, yet not immoral to own it?
Lincoln stated that no one holds the seller of pigs or horses in contempt, but the slaver is held in contempt by the Southerners as well as the Northerners.
So, Lincoln reasoned, slavery was an evil that had entangled the South and which the South had to find a way out of.
Instead her leaders sought to make it a virtue and a right to be defended even to the point of destroying the United States itself.
And to defend this insanity they marshall economic, legal, and political arguments to cast smoke over the real reason for the Souths secession- slavery.