Hate preachers are NOT harmless. Zebra murders were inspired by the hate preachings of Nation of Islam, who are close buddies of Rev. Wright, Jr.

Other acts of violence against those who appeared to be White or Jew were also inspired by these same maniacs.

(This history is in Wikipedia and search via Dogpile.com will bring up more.)

It is the dark side of the Black Power Movement.
It is their version of Black Supremacy.

Innocent people were killed or injured, even new immigrants and Native Americans, who "looked White."

This is why those who are educated about contemporary American History are freaked out to hear about a U.S. Senator being a member and close associate of these hate mongers.

Racism goes both ways and that fact is something we all need to recognize.

Supremacists also need to get basic education, that the world is not "black and white" and that many Americans do NOT wish to self-segregate and are not legitimate targets for their hatred.
What's really strange? This phenomena does not exist in Latin American countries, such as Panama and Brazil. There is no self-segregation by race.