This is where so many people get misdirected. Tariff's were the lesser part of Northern angst. The far greater threat was the flooding of European goods throughout the United States, thereby displacing the production of the monied industrialists.
Not only would they lose their shipping, banking, insurance, warehousing and tariff collections, they would find customers would gravitate away from their products because the stuff made in Europe was much better, and now much cheaper.
The people of that era were very money conscious because it was so hard to obtain money. 30% or 45% extra cost would have encouraged people to look elsewhere, and that elsewhere was European imports coming in through the Confederacy.
It's about money. All else is noise and trash talk.
“It’s about money. All else is noise and trash talk.”
Like the 4 million slaves with a market value estimated to be between $3.1 and $3.6 billion producing the bulk of Southern wealth?