Confedracy in few words.
Stupid racist white biggots with a silly flag and even dumber ideas of how the world should work in hypothetical scenarios that have been tested by other failed states.
Also, At the time of the civil war, the south had the majority of gold reserves of all the states. If the succeeded the north economy would have been set back. Bankers frown upon losing huge sums of money.
It would be similar if California parted from USA in our time.