Literally, word racism means the faith in a fake concept that a particular race, colour, cast or creed is superior then other. Unfortunately, but as a fact, racism existed in our history or throughout man's history. Let us start from the era when Portuguese sailor first explored Africa, they considered under serious rival first because they failed to technological advances of European power. They were treated as slave and labors.
Racism is nit an opinion, it is offence. Abraham Lincoln said "Achievement has no colour". Don't go so far, let's see what happened in T20 world cup 2016. Who was the winner of T20 world cup 2016, both men and women of West Indies were the champions of the world. Who were they? all of them was black peoples. Who were the biggest hunt of racism.
With respect to Islam, Hazrat Bilal(R.A)was a black man but his status in Islam was so high that sun didn't arose just because he hasn't gave "AZAN". No human race is superior. We may have different skin we all belong to HUMAN RACE.
Racism begins with hate which destroy the haters, hate like cancer no matter if you have little or a lot. Nelson Mandela, the ambassador of anti-racism movement is Africa said "Racism is a blight on human conscience"
Nelson Mendela served 27 years of his life in prison just for fighting against Racism.
The legend boxer, the black superman and sportsman of the century MUHAMMAD ALI was also a great victim of racism. Even after winning a Gold Medal in light Heavy Weight Champion in 1960 summer Olympics in Rome. He even couldn't got job in restaurant because he was BLACK. He was so dishearted and threw his Gold medal in River Ohaiyo. When he was converted to Islam and changed his legal name to MUHAMMAD ALI CLAY, which give massage of racial pride for African Americans.
