What you persist in ignoring is that the Corwin Amendment only protected slavery where it existed while the Confederate constitution mandated the legality of slavery in every square inch of territory the Confederacy had or would ever acquire in the future. Given the two choices which do you think the Southern slaveocracy would prefer?
Don’t forget that degeneratelamp also believes that the Dred Scott ruling resulted in a prohibition against any state banning slavery.
It existed in the United States. Specifically in 15 states prior to secession, and 16 after West Virginia split.
Passing the Corwin amendment meant it would linger until the very last state voluntarily gave it up.
Now what was it again they claimed they were fighting over?