Why is it that usually only whites "guys" are called racists?

Michael Richards, better known as Kramer from his TV days on Seinfeld makes a good point: "There are African Americans, Mexican Americans, Asian Americans, Arab Americans, etc. And then, there are just Americans. You pass me on the street and sneer in my direction, calling me 'white boy', 'cracker', 'honkey,'whitey'...and that's ok. But when I call you towel head, kike, camel jockey, beaner, gook, etc., you call me a racist."

"You have the United Negro College Fund, Martin Luther King Day, Black History Month, Cesar Chavez Day, NAACP, BET (If whites had WET - White Entertainment Television - they would be considered racists. White Pride Day and White History Day, you'd be a racist."

There are over 60 openly proclaimed Black Colleges in the U.S. Yet, if there were 'white colleges', that would be a racist college.

You get the point...calling the race card is just a cop out.