Racism on Chan Boards

What the hell is with all the racism on these chan boards?  All I see is "nigger" this and fucking "nigger" that, and "LOLS nigra!"  What the hell?  What is wrong with these retarded people?  Are most people here racist or something? 

I need this explained to me, really I do.  Do chan frequenters really think black people are inferior, or is it some other kind of messed-up inside joke I just don't get? 

It's sad when people who might want to have a meaningful discussion are forced to give up in disgust because anybody else with a brain is turned away by all the trolling and hate.