Mohamed Ould Cheikh Ould Mkhaitir wrote a blog post on Islam and racial discrimination.  In 2014 he was aressted and tried for apostasy and given the death penalty.  Now clerics are calling for him to be executed. Their statement:

“We demand that the competent authorities apply the law: kill him and bury him in conformity with the law of God.”

“Modern-day slavery is still a common practice in Mauritania.  According to some estimates, up to 600,000 Mauritanians, or 20% of the population, are still enslaved.  A 2012 CNN report, “Slavery’s Last Stronghold,” by John D. Sutter, describes and documents the ongoing slave-owning cultures. This social discrimination is applied chiefly against the “black Moors” (Haratin) in the northern part of the country, where tribal elites among “white Moors”.    Low-caste groups within the sub-Saharan African ethnic groups of the south are also sometimes enslaved.”