Abraham Lincoln is a war criminal.
States should be allowed to secede and not be persecuted.
If the Federal Government violates its restrictions enforced by the Constitution then it has violated the contract and a state has the legal right to secede from the union. The Federal Government is an evil aggressor if it, in response to violating its own contract to govern, declares war on a seceding state or sends armies against it.
History is written by the victors. That's why we don't actually have any idea what our history is, in content or scale. I've see convincing arguments that the Roman empire collapsed between 1200-1400, and Renaissance followed on its heels.
How many techno-civilizations have there actually been?
The victors always attempt to destroy evidence of true history, just like what they are doing now with the internet.