Once Abu Dharr, an Arab from the tribe of Ghifar, became angry with Bilal of Abyssinia, the freed slave of Abu Bakr, may Allah be pleased with them. The dispute intensified until Abu Dharr in his fury said to Bilal, "Son of a black woman!" Bilal complained to the Prophet, peace be upon him, who addressed Abu Dharr saying, "Did you call him a name reviling his mother? It appears that you still have traces of jahiliyyah [ignorance] in you!" Abu Dharr thought that jahiliyyah was a kind of sexual immorality or moral deviation and thus said, "At this old age, O Messenger of Allah?" The Prophet said in reply, "Yes, they are your brothers." Abu Dharr regretted what he had said and repented, and out of extreme repentance and humility requested Bilal to trample his face with his feet. This is the point which marks the line of demarcation between knowledge and ignorance. In other words, racial equality demarcates the real human civilization and the civilization of the jahiliyyah.
The civilization that does not make one race superior over another, or one colour over another is the civilization that the noble and intelligent humans build, and thus conscious noble humanity is pleased. The civilization which gives superiority to whites and degrades the black so that only the whites are happy and the coloured are in misery takes humanity back to the blind and dark ages. "You have traces of jahiliyyah in you" is a description of the jahili civilization which calls for racial discrimination and this is what Islamic Civilizations has fought in all fields of life – in the mosque, in the school, in the court, in the leadership and with friends and foe alike.
"The Islamic Civilization"- Mustafa Sibai, pp. 66, 67