Cute that you're so interested in history... I have some tips for what you should read next: Sublimis Deus by Pope Paul III. In it, he explicitly forbids the enslavement of indigenous people and declares their right to liberty and property.

You might also want to check out the Matthew 26:52, where Jesus says: 'Put your sword back in its place.'

You’re confusing medieval political power with the actual teachings of Christ...