If the someone who wanted to be left alone really wanted to be left alone, they shouldn't have opened fire on a federal reservation. They all but handed Lincoln all the justification he needed to present the fencesitters. The right of secession was a point which warranted some constitutional debate, but nothing in the Constitution could be read as permitting the attack on Fort Sumter. It was federal property.
"If the someone who wanted to be left alone really wanted to be left alone, they shouldn't have opened fire on a federal reservation."
Well, if you want to take it to that level, according to accepted international law, Lincoln committed the first act of war when he undertook to reinforce Sumpter.
It there was a right to secede, and there was, then Lincoln was obliged to get his troops off.
Being a Southernor and STILL a staunch secessionist, I have to applaud what you said here.