There have been a lot of wars. Most of them, I'm guessing, were not about slavery.
Tensions in this country, right now, are near the breaking point. And it's not about slavery today - although liberals say it is.
Saying the War Between the States was “all about slavery” is just another unspoken claim of virtue by the victors. It kind-of freights the murder with meaning.
Never said that the Civil War was all about slavery. The question was if there had been no slavery from the beginning of America, would there have been a Civil War?
My guess is that without slavery, the wealth and disparity between the North and South would not have developed in the same manner. Would there have been the wealth and the will to execute a decoupling from England through revolution. IDK but my guess is it would have been quite different.