And you don't think the natives did the same to other tribes?
Slavery was common during that period, especially in Sub-saharan Africa.
These slaves were taken from the Carrebean. With Columbus initiating a slave trade that didn't exist. And using torture, mutilation, disfigurement and murder without trial to control the native people's he'd enslaved.
I assume that these aren't the parts of Columbus' legacy that we celebrate on Columbus day.
Stop applying modern morals to past time periods with the intent to make it somehow seem aberrant for the time period.
Cutting out a woman's tongue for insulting him? Disfiguring a man by cutting off his ears and nose for stealing an ear of corn? These were not typical actions of the era.
His actions were so brutal and eggregious that even by the standards of his day it was
enough to get him stripped of his governorship and shipped back to Spain in chains. With Queen Isabella being disgusted by the slaves he brought brought back with him.