I dont know much about confederacy other then military aspects concerning civil war. Looking at the military personel.It would seem that many of them really thought that they had casus belli to fight Union as they felt that they were first citizens of their home states and only after it citizens of United states of America.If the Union were to invade their states. They felt they had the moral obligation to defend themselves and their state. To me the whole talk about values and justifications of the war boils down to the point if member states of the United states had right of secession from the federal state.