The problem - racism- is that it is not solely "owned" by whites.  If it was only ever exhibited by whites then you might not have as many people disagreeing.  Racism exists in every culture, in cities, in religion, in every country. 

I have friends from Africa that came here to the USA and tell me over and over the only REAL racism they experience is from their "cousins" (their word) American Blacks. That they are not remotely treated as poorly by whites, as they are by blacks -- REGARDLESS of what city in the US they have lived in. Several of my friends from Africa said that they would much rather live in a white neighborhood than a black neighborhood, One told me that while living in the black neighborhoods he and his 4 children were constantly called "stupid africans" But in white neighborhoods this has never happened to them.