Yeah, familiar with the argument. And let's say slavery was not just the prominent reason given, but the only reason given (which it wasn't).
You're telling me why states seceded, but missing the other half of your argument: why the North went to war. Seven states had seceded between Dec. 20 and Feb 1, before Lincoln took office March 4, and I don't see any war going on then...hmmm.
No; as I've stated, and it's been no secret for at least a decade now, the North was equally culpable in America's slavery. Everyone can kick themselves, or maybe no one should be kicking anyone. At least until everyone moves past a 1950s elementary school understanding of the subject.