Laz, we didn’t secede from anything. We threw of the chains of a monarchy. The Civil War was treason committed against a duly elected government.
Here is that cognitive dissonance from you again. The "monarchy" was the equivalent of the "duly elected government" of England. According to their laws, the King reigned supreme, and every subject owed perpetual allegiance to the King.
This nation was founded on the principle that people had a right to throw off a government that they felt did not serve their interests, and create a new one that would.
It says that in the Declaration of Independence.