Eh???
[G, #96] protectionism, subsidies for Northern business, disproportionate tax burden, and denial of rights in the territories
Your bringing tariff as a general issue into it is a non-sequitur. The South was not opposed to revenue tarrifs and ratified a constitution which allowed the same. Protectionism is favoritism by government for the benefit of a few at greater cost to all. As if to purposely chap the ass of Southerners, the higher duties paid on imported goods were turned around to subsidize (happy, Non?) Northern industry!
Today's equivalent looks like this: A conservative Christian starts his own business with all the risk his own. His business flourishes, and the tax man takes half his earnings in spite of his protests. Those earnings are then turned around to pay for abortions for federal employees and "art" such as Crucifix in Urine, which his money trapses around the country so that others might share in his offense.
There were duties on tobacco, cotton, and naval stores. All industries important to the south, and enjoying protections like those enjoyed up North. In fact, those same protections were kept in the southern tariff passed in May 1861, in spite of anti-protectionist clauses in the confederate constitution. So I guess protectionism is OK if it's your industries.