system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why the north was fighting against slavery in the civil war, yet the 13th amendment was barely passed by this same government?
gpt
The north didn't go to war to end slavery.  They went to war in order to preserve the union—to bring the southern states back under the USA.

The south, however, did secede because of slavery.  For a present day analogy, think of all those people who insist that Obama wasn't born in the USA, or that he is a "secret Muslim."  They are wrong, but they don't care, they just really hate the guy more than they care about truth.

A similar thing happened with Abraham Lincoln, but in a larger scale.  He wasn't planning to end slavery when he got elected, but the southern states freaked out that Lincoln was going to take their slaves away anyway.