Who would support the decision of changing slavery, North, some Southerners, or both?

Question

REMEMBER, THINK LIKE A PERSON FROM 1815..

Answer 1

You see, I was going to say that:
- The North and some Southerners would support this decision
- The North would support this because they banned slavery and excepted the blacks as their own
- Some Southerners would support this because some may have slaves but treat them as if they want to be treated
However, I wasn't sure if it was right or not.

Answer 2

I think you mean that Northerners "accepted" blacks.

I agree with your answer.