No shifting blame. Just the realization that the winning side gets to control the narrative and write the history books and those books don't always tell the truth. All you're doing is clinging to the popular version, which most people do. Folks like yourself seem incapable of having any perspective but your own.
The undeniable facts are that the CSA obviously felt they had the right to secede. That after said secession, Fort Sumter was on South Carolina/CSA sovereign soil and occupied by what was then a foreign military. Unacceptable in any context. They were warned multiple times to vacate and they refused. So they did what they thought was necessary. IMHO, these are important distinctions when folks such as yourself throw around nonsense about who declared war on whom.
The war began when Lincoln's army invaded the South.
Of course, none of this would really be a big deal if people were not still repeating the same kind of vitriol to continue to demonize the South.