Why did some Northerners oppose the abolitionist movement?

Answer 1

They were happy to enjoy the cotton revenues earned by the slave-holding South.

Also, most Northerners simply were not Abolitionists. They were usually prepared to tolerate slavery in its traditional heartlands. But they did not approve of an extended slave-empire in the South-west because it would give the South more power in Congress.

Answer 2

Because they were slave holders and slaves were considered their property and they didn't want to lose their property and the money the slaves made for them. Because they were greedy people who loved money more than human beings.

Answer 3

Because the south believed that slavery was essential to their economy, and that the north should stay out of it.

Answer 4

Americans opposed slavery for religious reasons. The majority of northern Americans did not believe that one person should own another person.