“The one who have attempted to rewrite history are the Lost Causers.”
No, the history you were taught is the rewritten history.
Then you’re really screwed because, outside of a few lost causers, very few believe your revisionism. And that’s as it should be because the history is clear, the records are there to be examined, and the statements of those who participated are easy to find.
Believe whatever makes you feeeeeeeeeeeeel good. The fact remains - slavery was the primary motivating factor in the south’s attempt to break away. They said so themselves.