Black Muslims today are so uninformed that they don’t even understand that Muhammad had many black slaves and called them raisin heads (Hadith vol.1:662, vol.9:256)

Muslims are told that Africans have hearts “grosser than a donkey” (Surah 9:61) . Ishaq: 243 “I heard the Apostle say: ‘Whoever wants to see Satan should look at Nabtal!’ He was a black man with long flowing hair, inflamed eyes, and dark ruddy cheeks…. Allah sent down concerning him: ‘To those who annoy the Prophet there is a painful punishment.” [Surah 9:61] “Gabriel came to Muhammad and said, ‘If a black man comes to you his heart is more gross than a donkey’s

Blacks Calling Themselves Muslims Should Be Ashamed

Slavery is one of the vilest institutions ever created by man. Islam institutionalized slavery. Allah, the Islamic God, created ETERNAL LAWS allowing Muslims to own and rape their slaves. Muslims can enslave kafirs and keep the female captives as sex-slaves.
If Islam succeeds in conquering the world, there will, most likely, arise again Islamic corporations for breeding, raising, and trading slaves in tens of millions as was done until the late 19th century. Kafir women will again likely become the sex-slaves of Muslim masters. This evil horrid treatment, which so characterized fate of tens of millions of kafirs at the hands of Muslims, may make a comeback on the world-stage.
Muhammad, the apostle of God, the Islamic prophet of peace, was a slaver. He owned 40 slaves some of them blacks. Muhammad had kept his female slaves as concubines, so did his comrades and pious companions.
Mahran, one of Muhammad’s black slave, was made him to carry the belongings of Muhammad and his companions while on a journey through the burning desert as Muhammad said: "Carry them, for you are a ship." Thereafter, he became known by that surname, Safina ('ship'). Relating this own story, Mahran said:

"The apostle of God and his companions went on a trip. (When) their belongings became too heavy for them to carry, Muhammad told me, 'Spread your garment.' They filled it with their belongings, then they put it on me. The apostle of God told me, 'Carry (it), for you are a ship.' Even if I was carrying the load of six or seven donkeys while we were on a journey, anyone who felt weak would throw his clothes or his shield or his sword on me so I would carry that, a heavy load. The prophet told me, 'You are a ship"' (refer to Ibn Qayyim, p. 115–116; al-Hulya, Vol. 1, p. 369, quoted from Ahmad 5:222).