The inherent problem I see in these discussions is the assumption the States/South/Secessionists were victims/oppressed just because they said they were. One reason for adjudication and politics is to hear the issue and attempt a resolution. Not just just make things up and secede.
Absolutely. That's also why I asked for grounds on the moral option.
In other words, it's much like having a legal right to unilaterally secede just because they said so. In the end, the law isn't going to stop anyone who is determined to get what they want no matter what. Hence, municipal police, county sheriffs, state troopers, US Marshals, FBI, Militia Clause, etc. Anyway, the whole basis of their approach was "Because We Say So." Some Southerners bought it, most Northerners did not.
IMHO, the disunionists of 1860-1865 clearly fail on both legal and moral grounds. Only a few diehards still try to argue otherwise.