So let me get this straight. In your world view no one was against slavery because they believed it was wrong? Is that a correct assessment of your view?
“So let me get this straight. In your world view no one was against slavery because they believed it was wrong?”
Nobody asked me, but . . . John Brown and those involved in his twisted murder raids believed slavery was wrong. There were probably others.
No, it is not. There was a teeny tiny minority of liberal Kooks in Massachusetts and a few other Northern states that opposed slavery strictly on moral grounds. They were considered Liberal nuts of their era. As Charles Dickens noted (after a six month tour of the United States both North and South)
"Every reasonable creature may know, if willing, that the North hates the Negro, and until it was convenient to make a pretense that sympathy with him was the cause of the War, it hated the Abolitionists and derided them up hill and down dale. For the rest, there's not a pins difference between the two parties. They will both rant and lie and fight until they come to a compromise; and the slave may be thrown into that compromise or thrown out, just as it happens."
I will add that Charles Dickens was an abolitionist and he was vicious in his attacks on Southerners who held slaves. You should read his commentary on slavery. As I said, he was vicious.
But the vast majority of people in the United States who hated slavery, hated it for two not so moral reasons. They hated it because they saw free labor as a threat to their own labor and wages. They also hated it because they hated black people, considered them inferior, and did not want them in their communities, even as servants. Look up the black laws of various Northern states such as Illinois.
But the people who hated it because it was a great moral wrong? They were a small minority that grew over time, and by the end of the war, everyone was pretending to be this sort of person.