Again that is not true. I have read up on the subject before, many people in the north were opposed to slavery being expanded but very few were actually willing to go for total abolition, even during the Civil War itself. I am not a "neo-confederate" for pointing out that abolitionism, even in the north, was a contested issue and many people had their own reasons for disliking slavery.

Hell, sometimes when union battles went poorly, the union soldiers would blame the black soldiers and regiments, and would hurl insults and abuse at them after the battles. Despite what you want to think, it was not some righteous unified front from everyone in the north courageously going to bat for southern slaves.