Disclosure of Secrets, page-525

"Hejaz (the western region of modern day Saudi Arabia), which encompasses approximately 12% of the total land area of Saudi Arabia, was under the control of the Ottoman Empire from 1517 to 1918, and as such nominally obeyed the Ottoman laws. When the area became an independent nation first as the Kingdom of Hejaz and then as Saudi Arabia, it became internationally known as a slave trade center during the interwar period. After World War II, growing international pressure eventually resulted in the formal abolition of the practice. Slavery was formally abolished in 1962. Many members of the Afro-Saudi minority are descendants of the former slaves."

And these Muslims descendants of former slaves living in Saudi Arabia (Islam cradle) a country that only outlawed slavery in 1962 owing to international pressure, have being complaining about being the target of racial discrimination.

A problem that extends to other areas of the world like, for instance, Muslim France where Muslims of color have been complaining that their inclusion into the wider white Muslim community has been just for photo taking purposes.