It wasn't 'aimed' at the South. It was a protective tariff designed to allow fledgling American industry to survive. You can argue with the merits of high tariffs or even protective tariffs in general, but a majority thought back then it better to allow American industry to grow than to always be dependent on Europe, and especially Great Britain (still roundly feared and despised at the time) for manufactured goods.
It had zero to do with the 3/5 compromise or slavery and many in the South actually favored it.
It was a protective tariff designed to allow fledgling American industry to survive.
Dubious. That type of tariff was already in place, adopted in 1816. The Tariff of 1828 was the second successive tax hike, and a substantial one at that. The only other time in American history that a rate (other than the income tax) reached that level was the notorious Smoot-Hawley Act that more or less added the term "Great" to the Depression of 1929. I'd also add that the fact some people think its "a good idea" is no excuse for a very bad economic policy. On the same note, quite a few people thought the Obama stimulus bill was "a good idea." That doesn't make it so, and it doesn't do squat to ameliorate the trillion dollar debt anchor that law has placed on the American economy.
It had zero to do with the 3/5 compromise or slavery and many in the South actually favored it.
Again, dubious. That's about like claiming that "many in South Carolina actually favor income tax hikes" today and pointing to James Clyburn as your evidence. There is always somebody who dissents, even in the reddest of red states. But even as James Clyburn wins in his district, he's at odds with the vast majority of his state and would never stand a chance if he ran at that level.
The truth of the matter is the south was a hotbed of anti-tariff agitation for most of the 1820's and 30's. It didn't start in 1828 either. It started shortly after Congress attempted to hike the tariff rates in 1820. Between 1824 and 1827, South Carolina, Georgia, and Virginia all adopted resolutions denouncing the EXISTING tariff rates as unconstitutionally high. Virginia even did it twice - the first one in 1826 was crafted at the direct behest of Thomas Jefferson (and signed by future president John Tyler), and the second one in 1827 as a final instruction that the recently deceased Jefferson had given to Gov. William Branch Giles.
When Congress hiked the rates again in 1828, the proverbial sh*t hit the fan. South Carolina came out swinging with the most famous denunciation, but it was not the only one. In all the following states adopted resolutions of some form denouncing protective tariffs:
Virginia (1826, 1827, 1829), South Carolina (1824, 1825, 1828, 1832), Georgia (1827, 1828), North Carolina (1828), Alabama (1828), and Mississippi (1829). Almost all of the pro-tariff counter-resolutions came from the north with the exception of Kentucky, which was home of Henry Clay and had long been a protectionist hotbed.
That’s what you have been lead to believe.