Mr. Lincoln’s war was really the Republicans (North) versus the Democrats (South). It just so happened that the Democrats were the slave owners. The Republicans won the war and to the victors went the spoils. They freed the slaves from the Democrat slave owners. But the reason the war began was not slavery, but the Southern states wanted to succeed.
The slaves had right to kill every single plantation owner, almost all of them demonrats. Some did revolt and kill. Now, in 2016, it is ancient history from last millennia. And completely irrelevant to all the crimes the blacks commit, including murders, rapes, destroying public order, etc.
Yes, the Southern states wanted to succeed. After seceding of course. But their secession wasn’t successful.