See Public Enemy, '911 is a Joke', https://www.youtube.com/watch?v=JZDIitWz8Go
I mean I'm editorialising a little, but while both suggest that black people are getting a pretty rotten deal decades after people usually thing the struggle for civil rights for black people were fought and ultimately won ... one indicates real, visceral hatred towards a single institution which has famously and repeatedly been confirmed to be well deserved (and additionally as a phrase or slogan is itself very well known around the anglophone world). The other does neither.