Here are some other quotes from influential leaders
Jefferson, author of the Declaration of Independence also stated: Whenever "any Form of Government becomes destructive" of the inalienable rights granted by the Creator, "it is the Right of the People to alter or abolish it, and to institute new Government."
The full passage from the Declaration clearly shows the illegitimacy of the secessionists' action:
"Prudence, indeed, will dictate that Governments long established should not be changed for light and transient causes; and accordingly all experience hath shewn that mankind are more disposed to suffer, while evils are sufferable than to right themselves by abolishing the forms to which they are accustomed. But when a long train of abuses and usurpations, pursuing invariably the same Object evinces a design to reduce them under absolute Despotism, it is their right, it is their duty, to throw off such Government"
Jefferson and his generation believed that revolution must be a sober action. I cannot think of a more light and transient cause than anger over losing an election. That hot headed stupidity by itself warrants the beating and humiliation the "Southern Revolution" received.