you correct war was inevitable after Dred Scott
if someone had won the presidency in 1860 that was going to enforce with Federal forces inside the free states then the free stated would have been in Rebellion
if the North and South head split peaceably you would have two countries vying for the same territory in the west and a continuation of the same forces of free states and slave states slaves escaping the North war between those two countries what is still been inevitable
the political Solution on slavery was the only option to keep the peace and many innthe South knew that was a dying institution also
slavery was ended many places all over the world peaceably
Dred Scott inflamed the situation polarizing the most extreme pro-slavery and anti-slavery forces on each side and basically froze the moderates in the middle that we’re trying to come up with a political solution ...
Dred Scott caused the War
I think so, too.
I doubt that. The abolitionists were actually a small minority of the Northern population. Most of the North didn't care one way or the other. Federal Enforcement of the Constitution would have produced some outcry from those people who were that era's version of Liberal kooks, but the rest of the population wouldn't think much about it.
Dred Scott caused the War
Money caused the war. Money and the possibility that the South would become economic competition for established industries in the North.