they did not like it
no the southern states approved of slavery and the northern states dissapproved of slavery
because the northern states were trying to abolish slavery, which was critical to the cotton and agricultural industry in the south.
Northerners were completely against slavery, and before the Civil War they took their hatred overboard by killing Southerners for their slavery.
Indifferent For A+
The south was agriculturally heavy, so they needed someone to do the hard work. The north was focused much more on industrial type jobs, which did not need slaves.
South Carolina seceded because they believed that the institution of slavery was in peril. I believe the Civil War was about states rights - that is, the states rights to maintain slavery. South Carolina was complaining about the northern states violating the Constitution by not enforcing the Fugitive Slave Act. The union felt that South Carolina was independent and did not want slavery so now they are in war.
It was one of the Confederate States - a slave state - and they felt slavery was okay.
Most northern people, including New Yorkers, felf that slavery was wrong and wanted to abolish it.
About how they feel
The Northern States were pleased by Three-Fifths Compromise.
The north never had any intention of secession. The reason the south seceded was because they wanted to separate themselves from the northern states and territories in order to pursue a government that they thought was more appropriate (more emphasis on states' rights and approval of slavery). The north's goal during the war was to keep unity in the country and try to get the southern states back in the Union. Secession of any northern states would have been the exact opposite of what they were aiming for.
The Southerners did not feel good about the future of slavery