is in no conceivable sense "immoral."
There is a conceivable sense and that sense obtains in the context of this thread.
It obtains in a proper understanding of the Founding.
Whether any polity, anywhere, may secede from another is a general case.
In the context of our history, though, this sense is immanent.
I may not leave my wife precipitously without breaking the vows of marriage. This is immoral. It is immoral to abnegate and abjure solemn agreements.
We are one nation. This was understood and exemplified in the Declaration.
No polity in this nation may declare that it is no longer part of this nation, for this nation was born a nation by the will of all the people of this nation and no public association subject to its jurisdiction may declare that it is not part of this nation.
This conception of the nation being one, a single people, a single nation, is a fundamental concept and is immanent in that conception. The notion that an association may 'secede' is, within the context of the Founding and the history of this nation, profoundly immoral, for it essentially avers that the association may, unilaterally, violate the agreement, present and immanent from 2 July 1776, if not earlier, that we are one nation and indivisible (I dearly hope people still remember the Pledge of Allegiance).
So we enter into whether precipitously and unilaterally, of its own accord, a polity within this nation may attempt to secede and consider that to be a moral act, although it can be demonstrated, as Lincoln did, that it is an abjuration of the most solemn agreements and principles.
Hogswallop.
As Laplace used to write, it should be easy to see that this idea is a promulgation of an immoral contention when considered within the context of US history and a clear understanding of why we are a nation - for this nation is a nation because of a set of principles, not whether our forefathers spoke Gothic and settled in Austrasia.
And a central fundamental principle is that we are indivisible.
What the South did was not only unconstitutional and illegal and unlawful, it was also immoral, profoundly and deeply immoral.
It is
not an abstruse point of litigation or some rather interesting and entertaining subject of theoretical discussion to be tossed around at the Sigma Pi bull session on Saturday night. To even
hint that any polity or association in this nation and subject to its jurisdiction may leave of its own accord is a deeply offensive and profoundly immoral proposition that must be countenanced out of a respect for other's rights, but it is also to be met with the plain and honest truth that such a notion is immoral and unlawful and directly contravenes an
essential and fundamental agreement reached by
all the people of this nation, well over two centuries ago.
To repeatedly maintain that secession is possible since that agreement was reached on 2 July 1776, if not before, is to resemble the south end of a horse going north.
To say that such an act could possibly be moral in the context of that agreement only demonstrates a poverty of understanding the Founding of this nation, its import and its meaning.
Read the First Inaugural Address, just that, and it should be clear as day that the set "principles inhered in the Founding of the United States" does not include secession. To assert that the set does contain that element is morally repugnant, for those principles were agreed to by all the people of this nation and secession is a dagger striking at adherence to oaths, solemn understandings and agreements and any clear understanding of justice.
"Slavery was immoral, but secession wasn't," is, in the context of the Founding and all that proceeded from it, an absurdity of the first order.