Since this thread is about slavery, I take it your reference to “wrongs committed by Southern leaders” is a reference to slavery in the United States.
Don't let me put words in your mouth.
If you are speaking of slavery in the United States, why do you limit your comment to “Southern leaders long since dead?”
From my experience, many northerners prefer to see slavery, and racism, as a southern problem rather than a national problem, or a global problem. The South lost the fortune they made out of human bondage; the North intends to keep theirs. And to keep it a secret, too.
Otherwise, we would be tearing down the flag of Brown University. But we are not tearing down the flag of Brown University.
By 1860 the North had almost completely ended slavery, as has been documented repeatedly for you on this thread. The South still had most of their culture and economy built on it. So much so that they were willing to go to the extreme of secession and war to protect it, whether it was in fact truly threatened or not.
But you tell me, was the institution of slavery wrong or not?
Virginians like George Washington, and Thomas Jefferson, And George Mason, and Patrick Henry said it was.
Jefferson engineered the Northwest Ordinance, pushing the transfer of that vast territory from Virginia to the general government, SLAVE-FREE, in perpetuity. The Virginia legislature signed off on it. Were they all wrong?