More rehashed neo-confederate nonsense. The slavemasters who started the war portrayed as innocent victims of the tyrant Lincoln. No mention of the fact that secession happened long before Lincoln became President. Was Democrat Buchanan a tyrant also?
Any President had the duty to defend the Constitution and put down the rebellion. Buchanan failed to act and Lincoln acted belatedly.
Your rehash is the one most blatantly absurd. Lincoln was not protecting the Constitution.
Each state was a voluntary member of the nation. They were under no constitutional obligation to stay under the federal system.
Killing hundreds of thousands of citizens, impoverishing the people and shredding the Constitution did nothing to preserve this nation.