The Saudis practiced slavery of Blacks for many centuries, yet they have no meaningful Saudi-Black population wrecking their country.
There is a very dark and troubling reason for that.
American blacks were the lucky ones.
Muhammad Ali once said: “Thank God my granddaddy got on that boat.”
The Saudis castrated their black slaves. A few were kept for breeding and frequently replaced. They were replaced by new breeders after they served their purpose and then they were promptly de-balled. The balls a sac removed.