>> import duties accounted for most of Federal Revenue in the 1800’s, when there were no income or corporate taxes <<
Of course. But “tariffs for revenue” were understood during the 1800’s to be conceptually and morally different from “tariffs for protection.”
Tariffs for protection are morally indefensible, while tariffs for revenue are a legitimate (if not always efficient) government tool.
For most of the 19th century, the most important dividing issue between Republicans (and their Federalists/Whig predecessors) and Democrats (Democratic Republicans) was tariffs vs. free trade.