Oh, they weren't trying to hurt anybody. /s There you go again with your crazy logic.
Now here is where you are starting to sound rational. "Prohibiting slavery was a fringe benefit" is exactly right. It was just the icing on the cake, and that is all it ever was. The real issue was "Preservation of the union", and that puts the ball right back in my court. The Union didn't have a right to preserve the Union. The Southern states had a right to leave it. Again, it's in the Declaration of Independence. The Authority cited is "God." "God Says it. I believe it. That settles it." :)
I don't believe they had the right because they didn't follow the Constitution, but apparently Lincoln was a lot more lenient than I because his administration let them go. When they stole property, tried to kill Americans at Sumter, and declared war, then they lost whatever little right they had in the Lincoln administration's mind.
The Constitution is not the dominant authority. It cannot be regarded as a more powerful authority in American Law than the previous British Law was regarded by the Colonies.
In British Law there was no question in anyone's mind that every subject owed the King perpetual allegiance. It was an absolutely unquestioned position, and yet they regarded the Principle of the Declaration of Independence to be sufficiently strong to morally override the British Law that had ruled them all their lives.
If the Declaration can override absolute British Law, which is clear and firm on the issue of Independence, it can certainly override a weak and tenuous claim to "Perpetual Allegiance" as some assert is in the Constitution.
It was the Declaration of Independence which gave the Constitution whatever power it possesses, not the other way around.
Now I very much doubt you can grasp the point I have put forth. You have impressed me as being nothing more than a typical emotional Knee Jerker without any interest in understanding concepts such as "Natural Law", and "Rights", and I figure that I have just wasted my time typing the explanation above.
Maybe i'll get surprised.