I agree that slavery was not the original sin and always had an opposition. When the North west territories were being settled slavery was outlawed there. The first 90 Years of America were largely spent in conflict over limiting slavery vs slaveries expansion.
Sadly not enough Americans know our own history about this. Most Americans are indoctrinated in the government schools to believe that abolitionism didn’t appear anywhere until Garrison started leading the abolitionist effort; with Americans accepting this narrative of abolitionism as a Civil War topic. Why wouldn’t abolitionism be a Civil War topic, abolitionism never existed prior to William Lloyd Garrison.
Most Americans believe abolitionism was first put on by the British and that we Americans led by Garrison copied the Brits and imported everything here.
This historiography is fake. The timeline cannot support it. It requires a willing suspension of disbelief to sustain it.