Of course, the North was full of people with strong economic or family ties to the South, who didn't mind Southern slavery and certainly didn't want to go to war against their friends & family.
And had Confederates not acted in the most uppity arrogant ways imaginable, those people would never have supported Civil War.
But Confederate slave owners could not be other than what they were, and so war became inevitable.
You will find it interesting to google New England textile mills and learn about child labor in those mills.
For example, “
The system of child labor in Rhode Island mills began with Rhode Island’s first textile mill - the Slater Mill. Samuel Slater’s first employees were all children from seven to twelve years of age. By 1830, 55% of the mill workers in Rhode Island were children. These children worked long hours in unhealthy factories for wages less than $1 per week.”
The owners of the New England textile mills needed the southern cotton. They didn’t care about slaves. They had their own slaves in their factories.
It was a different time with different values.