"The term 'white supremacy' has a redundancy. There is no need to use 'white' because only whites, European Christian whites, in particular exhibit racist supremacy. No other race in the world has it."

Actually, you might want to take a look at this:

https://en.wikipedia.org/wiki/Arab_slave_trade

"The Arab slave trade was the practice of slavery in the Arab world, mainly in Western Asia, North Africa, Southeast Africa, the Horn of Africa and Europe. This barter occurred chiefly between the medieval era and the early 21st century. The trade was conducted through slave markets in these areas, with the slaves captured mostly from Africa's interior."