Why did many northerns oppose the fugitive slave act and why did most white southerners support it?

many northerners opposed the fugitive slave act because it forced regular citizens to help capture runaway slaves whether they wanted to or not. most white southerners supported it because they considered the slaves to be property. :D

p.s. i tried to find the answer to this question on this website then i actually looked in my text book and found it.! so i decided to share my answer with everyone! NO PROBLEM! :)