As if there were never any slaves on this content before Columbus.
Slavery is as old as mankind.
Why aren't the Romans ever chastised for their slavery?
Even Christ told slaves to obey their masters.
All these present day folks bitchin and moaning about slavery in the past, need to get over it, and move on.
Lots of people bitchin' and moaning about the past in general need to get over it and move on.