This is the real lesson of the Civil War era that seems to be lost. The Federal Govt. is a construct that can be disposed of and reconstructed at will by the states - very quickly I might add.
It seems that most of these posters and most historians seem to always join the ideas of secession to slavery, and war to secession as if they are all cemeted together in one simple construct and series of events.
It makes their narratives to protect Lincoln from the murderous war much easier to swallow.