Hitler copied segregation from the Jim Crow South. Also, before that is even worse in the US. A sizeable part of the US population was forcibly taken from their families and subjected to a lifetime of hard labor and rape. This was considered legal and normal at the time.

Every so often you hear about some freako who has kidnapped someone and kept them alive for years chained in a basement. Maybe they have to work or do sexual favors for their captor. We now consider that person a victim and their captor the worst kind of criminal. That disgusting criminal was an average slaveowner in the US South.