Explanation: In the USA, there's a bizarrely persistent idea, particularly amongst right-wing types, that the US Civil War was fought over some reason other than racism and slavery, particularly the vague call of "States' Rights".
In reality, the secessionist Confederacy was quite open and proud about their original reasons for seceding being racism and slavery, and only after their slaver asses were crushed and chattel slavery was abolished did they start to make up post-war justifications to sound less abhorrent.

