You are wrong, and by believing that you undermined everything the Founders' fought for.
So I guess the founders didn't attempt to create a federal government that was more powerful than individual states? You could have fooled me. We would still have the Articles of Confederation if the founders didn't want a stronger central government. Secession was an illegal act. It violated the Constitution, and Lincoln did what he had to do to keep the Union intact. Are you suggesting that America would be better off if the South had won and the country was divided into multiple nations? Do you think slavery should still exist?