You think the Northern slave traders (all those shipping companies....) had a problem with it?
You think the average Northerner had a problem with it? You might want to consider the laws in many Northern states prior to the War of Northern Aggression.
There you go; lose the argument - change the terms. The original comment had to do with the claim that the South was fighting to preserve "government for the people, by the people and of the people”.
Not only is the phrase strangely borrowed from Lincoln, but it's use to justify a democracy built on enslaving 1/3 of the population, and dedicated to preserving the States' "right" to do so, is somewhat discordant.
What is that???