This is not the only time the good judge's opinions were confused & disoriented.
A normally brilliant lawyer, in this case Napolitano here buys into the pro-Confederate Big Lie, namely that Lincoln started Civil War to prevent Southern secession.
That is not just a pro-Confederate Big Lie, it is an unspeakably outrageous lie, which takes no great historical expertise to puncture.
In actual historical fact:
What did start Civil War was the Confederate military assault on Union troops in Union Fort Sumter, soon followed by a formal declaration of war on the United States and military aid to pro-Confederates fighting in Union Missouri.
All that happened before a single Confederate soldier was killed directly in battle with any Union force, and before any Union army invaded a single Confederate state.
So, accusing Lincoln of starting Civil War is just like accusing President Roosevelt of attacking the Japanese at Pearl Harbor.
It is an unspeakably outrageous Big Lie.